<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the Balance
Sheet and statement of operations found on pages 2, 3 and 4 of the company's
form 10-QSB for the year-to-date, and is qualified in its entirety by reference
to such financial statements.
</LEGEND>
<MULTIPLIER>   1000
       
                      
<PERIOD-TYPE>            9-MOS
<FISCAL-YEAR-END>                       APR-30-1997
<PERIOD-END>                            JAN-31-1997
<CASH>                                          459
<SECURITIES>                                  1,007
<RECEIVABLES>                                 1,467
<ALLOWANCES>                                     70
<INVENTORY>                                   1,451
<CURRENT-ASSETS>                              4,886
<PP&E>                                        5,981
<DEPRECIATION>                                3,905
<TOTAL-ASSETS>                                7,214
<CURRENT-LIABILITIES>                         1,243
<BONDS>                                         366
<COMMON>                                         30
<PREFERRED-MANDATORY>                             0
<PREFERRED>                                       0
<OTHER-SE>                                    5,398
<TOTAL-LIABILITY-AND-EQUITY>                  7,214
<SALES>                                       7,433
<TOTAL-REVENUES>                              7,433
<CGS>                                         4,100
<TOTAL-COSTS>                                 4,100
<OTHER-EXPENSES>                              2,895
<LOSS-PROVISION>                                 14
<INTEREST-EXPENSE>                               30
<INCOME-PRETAX>                                 543
<INCOME-TAX>                                    206
<INCOME-CONTINUING>                             337
<DISCONTINUED>                                    0
<EXTRAORDINARY>                                   0
<CHANGES>                                         0
<NET-INCOME>                                    337
<EPS-PRIMARY>                                   .12
<EPS-DILUTED>                                   .11