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Percent calculator
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Patent number 3,944,789
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Issue date Mar 16, 1976
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Jon L. Moffat
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G06 - COMPUTING CALCULATING COUNTING
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2659532
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Patent number 2,659,532
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Issue date Nov 17, 1953
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G06 - COMPUTING CALCULATING COUNTING
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2531633
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Patent number 2,531,633
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Issue date Nov 28, 1950
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G06 - COMPUTING CALCULATING COUNTING
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2486945
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Patent number 2,486,945
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Issue date Nov 1, 1949
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2413888
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Patent number 2,413,888
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Issue date Jan 7, 1947
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G06 - COMPUTING CALCULATING COUNTING
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2193848
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Patent number 2,193,848
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Issue date Mar 19, 1940
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G06 - COMPUTING CALCULATING COUNTING
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1952303
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Patent number 1,952,303
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Issue date Mar 27, 1934
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G06 - COMPUTING CALCULATING COUNTING
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1913140
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Patent number 1,913,140
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Issue date Jun 6, 1933
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G06 - COMPUTING CALCULATING COUNTING
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1890182
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Patent number 1,890,182
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Issue date Dec 6, 1932
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G06 - COMPUTING CALCULATING COUNTING
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1819921
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Patent number 1,819,921
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Issue date Aug 18, 1931
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G06 - COMPUTING CALCULATING COUNTING
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1691761
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Patent number 1,691,761
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Issue date Nov 13, 1928
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G06 - COMPUTING CALCULATING COUNTING
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1547264
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Patent number 1,547,264
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Issue date Jul 28, 1925
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G06 - COMPUTING CALCULATING COUNTING
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1538250
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Patent number 1,538,250
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Issue date May 19, 1925
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G06 - COMPUTING CALCULATING COUNTING
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1518547
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Patent number 1,518,547
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Issue date Dec 9, 1924
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G06 - COMPUTING CALCULATING COUNTING
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1504632
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Patent number 1,504,632
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Issue date Aug 12, 1924
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G06 - COMPUTING CALCULATING COUNTING
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1492313
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Patent number 1,492,313
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Issue date Apr 29, 1924
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G06 - COMPUTING CALCULATING COUNTING
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1491800
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Patent number 1,491,800
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Issue date Apr 29, 1924
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1491828
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Patent number 1,491,828
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Issue date Apr 29, 1924
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G06 - COMPUTING CALCULATING COUNTING
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1492046
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Patent number 1,492,046
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Issue date Apr 29, 1924
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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1472276
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Patent number 1,472,276
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Issue date Oct 30, 1923
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G06 - COMPUTING CALCULATING COUNTING
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1426484
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Patent number 1,426,484
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Issue date Aug 22, 1922
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G06 - COMPUTING CALCULATING COUNTING
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1422235
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Patent number 1,422,235
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Issue date Jul 11, 1922
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G06 - COMPUTING CALCULATING COUNTING
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1411357
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Patent number 1,411,357
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Issue date Apr 4, 1922
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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1401692
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Patent number 1,401,692
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Issue date Dec 27, 1921
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G06 - COMPUTING CALCULATING COUNTING
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1383227
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Patent number 1,383,227
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Issue date Jun 28, 1921
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G06 - COMPUTING CALCULATING COUNTING
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1377856
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Patent number 1,377,856
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Issue date May 10, 1921
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G06 - COMPUTING CALCULATING COUNTING