Exhibit 99.1

Wilson Greatbatch Technologies, Inc. Announces Acquisition Of NanoGram Devices
Corporation

     CLARENCE, N.Y.--(BUSINESS WIRE)--March 16, 2004--Wilson Greatbatch
Technologies, Inc. ("WGT") (NYSE:GB) announced today that it has completed the
acquisition of NanoGram Devices Corporation ("NDC"), located in Fremont,
California. NDC is a materials research and development ("R&D") company focused
on developing nanoscale materials for use in various battery and medical device
applications.
     Under terms of the agreement, WGT acquired all of the outstanding stock of
NDC for $45 million in cash. WGT expects that the acquisition will result in
increased operating expenses of approximately $6 to $7 million during 2004, most
of which will be directed toward R&D as well as product engineering. In addition
to increased operating expenses over the remainder of the year, the acquisition
will result in a first-quarter, one-time, non-cash charge for the write off of
the fair value of NDC's in-process R&D as well as one-time transaction costs.
The amount of the in-process R&D charge and other purchase accounting
allocations will be determined by an independent valuation, and WGT anticipates
providing more detail on the financial impact of the transaction on 2004
projected results when it reports first quarter results on April 28, 2004.
     "The addition of NDC's patented nanomaterials synthesis technology provides
an opportunity to extend our battery product line offering, as well as an
opportunity to enhance the development of new products that incorporate WGT and
NDC technologies said Edward F. Voboril, WGT's Chairman, President and Chief
Executive Officer. "The inclusion of nanomaterial technology will provide us
with another dimension to explore in developing reliable power products for use
in medical device applications."
     "We are very pleased to be joining WGT, the recognized leader in the
development of medical power sources, commented Barry Cheskin, President and
Chief Executive Officer of NDC. The combination of our research efforts will
enable WGT to continue bringing advanced products to the market for use in
implantable medical devices."

     Conference Call

     Mr. Voboril, Lawrence P. Reinhold, the Company's Executive Vice President
and Chief Financial Officer and Curtis F. Holmes, the Company's Chief Technology
Officer will discuss the acquisition in a conference call scheduled for
Wednesday, March 17, at 8:30 a.m. EDT. The conference call will be webcast and
is accessible through the Company's website at www.greatbatch.com or at CCBN's
individual investor center at www.fulldisclosure.com. The webcast will be
archived on both websites for future on-demand replay.

     About Wilson Greatbatch Technologies

     Wilson Greatbatch Technologies, Inc. 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.

     About NanoGram Devices Corporation

     NanoGram Devices Corporation develops novel materials technology based on
its proven and patented laser-based nanomaterials synthesis process. Additional
information about the company is available at www.nanogramdevices.com.

    CONTACT: Wilson Greatbatch Technologies, Inc.
             Anthony Borowicz, 716-759-5809
             tborowicz@greatbatch.com