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3927725
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Patent number 3,927,725
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Issue date Dec 23, 1975
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G01 - MEASURING TESTING
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3894591
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G01 - MEASURING TESTING
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3167138
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Patent number 3,167,138
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G01 - MEASURING TESTING
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2653565
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Patent number 2,653,565
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G01 - MEASURING TESTING
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2502039
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Patent number 2,502,039
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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2348374
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Patent number 2,348,374
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Issue date May 9, 1944
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G01 - MEASURING TESTING
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2348375
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Patent number 2,348,375
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Issue date May 9, 1944
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G01 - MEASURING TESTING
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2262784
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Patent number 2,262,784
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Issue date Nov 18, 1941
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G01 - MEASURING TESTING
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1914973
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Patent number 1,914,973
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G01 - MEASURING TESTING
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1817446
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Patent number 1,817,446
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G01 - MEASURING TESTING
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1800742
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Patent number 1,800,742
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G01 - MEASURING TESTING
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1706965
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Patent number 1,706,965
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G01 - MEASURING TESTING
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1706510
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Patent number 1,706,510
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G01 - MEASURING TESTING
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1701031
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G01 - MEASURING TESTING
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1676052
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Patent number 1,676,052
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G01 - MEASURING TESTING
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1663983
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Patent number 1,663,983
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G01 - MEASURING TESTING
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1579576
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G01 - MEASURING TESTING
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1504333
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G01 - MEASURING TESTING