Exhibit 99.1

      Wilson Greatbatch Technologies, Inc. Reports Second Quarter Results

     CLARENCE, N.Y.--(BUSINESS WIRE)--Aug. 5, 2004--Wilson Greatbatch
Technologies, Inc. (the "Company") (NYSE: GB) today reported its results for the
second quarter ended June 30, 2004.

     Business Summary

     --   The Company received additional notification that a major customer
          will further reduce its orders for the balance of this year. As a
          result, the Company has revised its sales guidance for the full year
          2004 to between $195-$205 million, compared to its previous sales
          guidance range of $220 to $230 million.

     --   In response to the reduced sales forecasts, management implemented a
          7% workforce reduction during June, which resulted in a one-time
          severance charge of $0.8 million during the quarter and the
          elimination of approximately $8 million from the Company's ongoing
          cost structure.

     --   The Company signed a long-term agreement with a major diversified CRM
          device manufacturer to provide value-added sub-assembly of most of
          their implantable medical devices for Cardiac Rhythm Management
          ("CRM") and other applications. It is currently anticipated that sales
          will commence in the second quarter of 2005.

     --   Construction on the new advanced battery manufacturing facility is on
          schedule.

     --   Integration of the NanoGram Devices Corporation ("NDC") acquisition is
          proceeding as planned. The first Nano-Silver Vanadium Oxide ("SVO")
          cells were successfully manufactured in June and are on test.

     --   During the quarter the Company acquired certain patents that cover how
          capacitors are used in an Implantable Cardioverter Defibrillator
          ("ICD"). Although management believes the patents could have been
          successfully challenged in court proceedings, a decision was made to
          acquire the patents and remove this as a potential obstacle for
          existing customers to more fully adopt wet tantalum technology and for
          potential customers to initially adopt the technology. The Company
          recorded a $2 million pre-tax charge associated with these patents.

     --   The Company began construction on a new manufacturing facility in
          Tijuana, Mexico. This facility will initially house the Company's new
          value-added assembly operations. The Company anticipates that it will
          incur approximately $3 million in start-up expenses in 2004 pertaining
          to the construction of this facility.

     Net sales totaled $52.9 million during the second quarter of 2004, a
decrease of 5% from the second quarter of 2003. Net income for the second
quarter decreased by 4% to $4.7 million from $5.0 million a year ago, and
diluted earnings per share decreased by 4% to $0.22 compared with $0.23 in the
prior year. The current quarter includes one-time pre-tax charges of $2.8
million for the aforementioned severance and patent acquisition costs.
     Edward F. Voboril, Chairman, President and Chief Executive Officer
commented, "We are disappointed with the reduction in sales volume and the
impact it will have on this year's earnings. However, we have taken the
necessary actions to mitigate the volume shortfall with the implementation of a
corporate-wide cost reduction plan. Looking ahead, we have entered into an
important long-term agreement with a major CRM device manufacturer for
value-added sub-assembly of most of their implantable medical devices. The
assemblies will contain components manufactured by the Company, components
presently manufactured by the customer as well as other components purchased
from third parties. We welcome the opportunity to broaden this relationship by
taking on this very important work for them and using it as the basis for
expanding our value-added assembly capability. In addition, we added another wet
tantalum capacitor customer in the second quarter. This customer is not part of
our traditional customer base and the device involves an entirely new
therapeutic approach, which could represent a very large market segment in the
future."
     "Overall, the CRM market continues to exhibit strong underlying growth. The
technology investments we have made in developing the next generation ICD
battery, the emerging area of nanotechnology, combined with our sophisticated
value-added assembly operation will enable us to maintain our leadership
position. Furthermore, we are significantly expanding our business with a major
CRM device manufacturer, and we continue to work closely with all of our
customers on new business opportunities," Voboril concluded.

     Sales Summary

     The following table summarizes the Company's sales by business unit and
major product line for the second quarters in 2004 and 2003 (in thousands):


Business Unit/Product Lines             2004       2003         %
                                       2nd Qtr    2nd Qtr    Change
- ----------------------------------------------------------------------
Implantable Medical Components:
- ----------------------------------------------------------------------
       ICD Batteries                  $10,119    $11,278      -10%
- ----------------------------------------------------------------------
       Pacemaker & Other Batteries     5,361      7,022       -24%
- ----------------------------------------------------------------------
       ICD Capacitors                  6,239      7,849       -21%
- ----------------------------------------------------------------------
       Feedthroughs                    12,261     12,108       +1%
- ----------------------------------------------------------------------
       Enclosures                      5,142      6,310       -19%
- ----------------------------------------------------------------------
       Other                           7,077      4,454       +59%
- ----------------------------------------------------------------------
Total Implantable Medical Components   46,199     49,021       -6%
- ----------------------------------------------------------------------
Electrochem Power Solutions            6,743      6,781        -1%
- ----------------------------------------------------------------------
    Total Sales                       $52,942    $55,802       -5%
- ----------------------------------------------------------------------

     Profit & Loss Summary

     The following table summarizes selected information derived from the
condensed consolidated statements of operations for the second quarters in 2004
and 2003 (in thousands):


                                        2004       2003         %
                                       2nd Qtr    2nd Qtr    Change
- ----------------------------------------------------------------------
Gross Profit                          $23,818    $23,217       +3%
- ----------------------------------------------------------------------
Gross Margin                            45.0%      41.6%
- ----------------------------------------------------------------------

- ----------------------------------------------------------------------
SG&A Expenses                          $6,389     $8,146      -22%
- ----------------------------------------------------------------------
SG&A Expenses as % of Sales             12.1%      14.6%
- ----------------------------------------------------------------------

- ----------------------------------------------------------------------
RD&E Expenses, net                     $5,688     $4,635      +23%
- ----------------------------------------------------------------------
RD&E Expenses, net as % of Sales        10.7%      8.3%
- ----------------------------------------------------------------------

- ----------------------------------------------------------------------
Other Operating Expense                $2,957      $77        3740%
- ----------------------------------------------------------------------

- ----------------------------------------------------------------------
Operating Income                       $7,708     $9,546      -19%
- ----------------------------------------------------------------------
Operating Margin                        14.6%      17.1%
- ----------------------------------------------------------------------

- ----------------------------------------------------------------------
Effective Tax Rate                      30.5%      31.5%       -1%
- ----------------------------------------------------------------------


     The gross margin improvement is primarily due to improvements in scrap from
Six Sigma and Lean Manufacturing initiatives, improved cost structure for
commercial batteries from the consolidation of manufacturing operations, volume
mix changes for certain medical products and lower manufacturing incentive
compensation expenses. It is expected, however, that gross margins will decrease
from current levels in the second half due to the anticipated lower production
volume.
     Lower SG&A expense is primarily due to the elimination of certain general
management positions resulting from an internal reorganization from four
business units to two business units and from lower incentive compensation.
     RD&E expenses include incremental development costs from the Greatbatch
Technologies Advanced Research Lab, which was created from the acquisition of
NanoGram Devices Corporation during March, as well as additional RD&E management
personnel, net of lower incentive compensation.
     Other expense is comprised of the $2 million charge for the capacitor
patents and $0.8 million in severance costs related to the cost reduction plan.
     The income tax rate reduction results primarily from the benefits from
various federal and state planning initiatives.

     Outlook

     Management expects total sales for 2004 to be in the range of $195-$205
million. The Company now expects fully diluted earnings per share for 2004 of
$0.51-$0.58, inclusive of the $5.8 million in pre-tax expenses pertaining to the
severance charge, acquired patents and the anticipated start-up costs of the
Mexico facility.
     The Company anticipates capital spending to be in the range of $47-$52
million in 2004. The majority of this spending is for the construction of the
new advanced battery facility, leasehold improvements on the Mexico facility and
for spending on Information Technology projects.
     For the full year 2005, based on current expectations, the Company is
projecting sales of $207-$230 million. The Company anticipates updating this
projection and providing profitability and capital spending guidance for 2005 at
a later date.

     Conference Call

     Mr. Voboril and Lawrence P. Reinhold, the Company's Executive Vice
President and Chief Financial Officer, will discuss second quarter 2004
financial results in a conference call scheduled for today, Thursday, August 5,
at 5:00 p.m. EDT. The conference call will be webcast live and is accessible
through the Company's website at www.greatbatch.com or at CCBN's individual
investor center at www.companyboardroom.com. The webcast will also include
presentation visuals. The webcast will be archived on both websites for future
on-demand replay.

     Forward-Looking Statements

     Some of the statements in this press release, including those statements
made under the headings "Revised 2004 Guidance", and other written and oral
statements made from time to time by the company and its representatives are
"forward-looking statements" within the meaning of Section 27A of the Securities
Act of 1933, as amended, and section 21E of the Securities Exchange Act of 1934,
as amended, and involve a number of risks and uncertainties. These statements
can be identified by terminology such as "may," "will," "should," "could,"
"expects," "intends," "plans," "anticipates," "believes," "estimates,"
"predicts," "potential" or "continue" or the negative of these terms or other
comparable terminology. These statements are based on the Company's current
expectations. The Company's actual results could differ materially from those
stated or implied in such forward-looking statements. Risks and uncertainties
that could cause actual results to differ materially from those stated or
implied by such forward-looking statements include, among others, the following
matters affecting the Company: dependence upon a limited number of customers;
customer ordering patterns; product obsolescence; inability to market current or
future products; pricing pressure from customers; reliance on third party
suppliers for raw materials, products and subcomponents; fluctuating operating
results; inability to maintain high quality standards for our products;
challenges to our intellectual property rights; product liability claims;
inability to successfully consummate and integrate acquisitions; unsuccessful
expansion into new markets; competition; inability to obtain licenses to key
technology; regulatory changes or consolidation in the healthcare industry; and
other risks and uncertainties described in the Company's Annual Report on Form
10-K, including Exhibit 99.1 thereto, and in other periodic filings with the
Securities and Exchange Commission. The Company assumes no obligation to update
forward-looking information in this press release whether to reflect changed
assumptions, the occurrence of unanticipated events or changes in future
operating results, financial conditions or prospects, or otherwise.

     About Wilson Greatbatch Technologies

     Wilson Greatbatch Technologies, Inc. (NYSE: GB) is a leading developer and
manufacturer of critical components used in implantable medical devices and
other technically demanding applications. Additional information about the
Company is available at www.greatbatch.com.


                      WILSON GREATBATCH TECHNOLOGIES, INC.
                      CONDENSED CONSOLIDATED BALANCE SHEET
                                   (Unaudited)
                                 (In thousands)

ASSETS                                          June 30,  December 31,
                                                   2004       2003

Current assets:
  Cash and cash equivalents                     $  79,851    $119,486
  Short-term investments                            3,070      11,559
  Accounts receivable, net                         29,354      23,726
  Inventories                                      32,989      28,598
  Prepaid expenses and other current assets         2,474       3,591
  Refundable income taxes                             575         583
  Deferred income taxes                             3,163       3,163
  Asset available for sale                          3,600       3,658
                                                 ---------    --------
          Total current assets                    155,076     194,364

Property, plant, and equipment, net                74,994      63,735
Intangible assets, net                             66,079      51,441
Goodwill                                          156,825     119,521
Deferred income taxes                               2,896       2,896
Other assets                                        6,000       6,286
                                                 ---------    --------
Total assets                                    $ 461,870    $438,243
                                                 =========    ========

LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
  Accounts payable                              $   5,641    $  4,091
  Accrued expenses and other current
   liabilities                                     13,491      18,968
  Current portion of long-term debt                 1,182         850
                                                 ---------    --------
           Total current liabilities               20,314      23,909

Long-term debt, net of current portion                939         928
Convertible subordinated notes                    170,000     170,000
Deferred income taxes                              18,786       7,251
Other long-term liabilities                           815         815
                                                 ---------    --------
           Total liabilities                      210,854     202,903
                                                 ---------    --------

Stockholders' equity:
  Preferred stock                                       -           -
  Common stock                                         21          21
  Additional paid-in capital                      211,778     207,969
  Deferred stock-based compensation                  (849)     (1,185)
  Treasury stock, at cost                               -        (179)
  Retained earnings                                40,066      28,714
                                                 ---------    --------
           Total stockholders' equity             251,016     235,340
                                                 ---------    --------
Total liabilities and stockholders' equity      $ 461,870    $438,243
                                                 =========    ========


                      WILSON GREATBATCH TECHNOLOGIES, INC.
                 CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS
                                   (Unaudited)
                     (In thousands except per share amounts)

                                  Three months ended  Six months ended
                                      June 30,           June 30,
                                     2004    2003*     2004      2003*

Sales                              $52,942 $55,802  $108,467 $110,659
Cost of sales                       29,124  32,585    61,474   64,629
                                    ------- -------  -------- --------
       Gross profit                 23,818  23,217    46,993   46,030
Selling, general and
   administrative expenses           6,389   8,146    13,314   15,837
Research, development and
 engineering costs, net              5,688   4,635    10,569    9,195
Amortization of intangible assets    1,076     813     1,851    1,628
Other operating expense, net         2,957      77     3,178      147
                                    ------- -------  -------- --------
     Operating income                7,708   9,546    18,081   19,223
Interest expense                     1,144     867     2,304    1,798
Interest income                       (245)   (122)     (558)    (131)
Early extinguishment of debt             -   1,603         -    1,603
Other expense (income), net             (2)    (30)        -      (88)
                                    ------- -------  -------- --------
     Income before income taxes      6,811   7,228    16,335   16,041
Provision for income taxes           2,078   2,276     4,983    5,052
                                    ------- -------  -------- --------
     Net income                    $ 4,733 $ 4,952  $ 11,352 $ 10,989
                                    ======= =======  ======== ========

Diluted earnings per share         $  0.22 $  0.23  $   0.53 $   0.51

Diluted average shares outstanding  21,496  21,535    21,562   21,416

*  Reclassed for consistency with 2004 presentation.


     CONTACT: Wilson Greatbatch Technologies, Inc.
              Lawrence P. Reinhold, 716-759-5602
              lreinhold@greatbatch.com
              or
              Anthony W. Borowicz, 716-759-5809
              tborowicz@greatbatch.com