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<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 378,798
<SECURITIES> 633,945
<RECEIVABLES> 1,769,927
<ALLOWANCES> 27,400
<INVENTORY> 1,367,671
<CURRENT-ASSETS> 4,443,320
<PP&E> 4,526,126
<DEPRECIATION> 2,996,842
<TOTAL-ASSETS> 6,462,916
<CURRENT-LIABILITIES> 516,802
<BONDS> 0
0
0
<COMMON> 129,806
<OTHER-SE> 5,816,308
<TOTAL-LIABILITY-AND-EQUITY> 6,462,916
<SALES> 2,739,814
<TOTAL-REVENUES> 5,038,349
<CGS> 2,420,256
<TOTAL-COSTS> 4,600,195
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 0
<INCOME-PRETAX> 481,385
<INCOME-TAX> 183,000
<INCOME-CONTINUING> 298,385
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 298,385
<EPS-BASIC> .23
<EPS-DILUTED> .23
</TABLE>
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