<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS OF PROTEON, INC. AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
                                                                       
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996             DEC-31-1996
<PERIOD-START>                             JAN-01-1996             JAN-01-1996             JAN-01-1996
<PERIOD-END>                               MAR-30-1996             JUN-29-1996             SEP-30-1996
<EXCHANGE-RATE>                                      1                       1                       1
<CASH>                                          23,691                  19,283                  13,063
<SECURITIES>                                     8,649                   7,621                   8,593
<RECEIVABLES>                                    9,711                   6,616                   9,743
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                      8,238                  11,591                  11,171
<CURRENT-ASSETS>                                52,188                  47,048                  44,167
<PP&E>                                          32,343                  32,892                  32,753
<DEPRECIATION>                                  24,377                  25,137                  25,621
<TOTAL-ASSETS>                                  60,154                  54,803                  52,299
<CURRENT-LIABILITIES>                           12,621                   9,582                   8,900
<BONDS>                                              0                       0                       0
<COMMON>                                        49,186                  49,220                  49,263
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<OTHER-SE>                                     (1,653)                 (3,999)                 (5,864)
<TOTAL-LIABILITY-AND-EQUITY>                    60,154                  54,803                  52,299
<SALES>                                         10,297                  18,056                  25,357
<TOTAL-REVENUES>                                14,018                  24,664                  35,253
<CGS>                                            5,685                  10,284                  14,457
<TOTAL-COSTS>                                    6,787                  12,501                  17,971
<OTHER-EXPENSES>                                 7,549                  15,105                  22,273
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                               (459)                   (738)                 (1,024)
<INCOME-PRETAX>                                    141                 (2,204)                 (3,967)
<INCOME-TAX>                                         0                       0                       0
<INCOME-CONTINUING>                                141                 (2,204)                 (3,967)
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                       141                 (2,204)                 (3,967)
<EPS-PRIMARY>                                      .01                   (.14)                   (.26)
<EPS-DILUTED>                                      .01                   (.14)                   (.26)