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Moon phase device
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Issue date Oct 26, 1999
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Sean Anderson Barton
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G06 - COMPUTING CALCULATING COUNTING
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Biorhythmic slide rule
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Patent number 4,230,936
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Daniel P. Oerth
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G06 - COMPUTING CALCULATING COUNTING
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3635397
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Patent number 3,635,397
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G06 - COMPUTING CALCULATING COUNTING
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3473731
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Patent number 3,473,731
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G06 - COMPUTING CALCULATING COUNTING
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3370789
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Patent number 3,370,789
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G06 - COMPUTING CALCULATING COUNTING
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2513196
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Patent number 2,513,196
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Issue date Jun 27, 1950
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G06 - COMPUTING CALCULATING COUNTING
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2512446
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Patent number 2,512,446
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G06 - COMPUTING CALCULATING COUNTING
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2511555
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Patent number 2,511,555
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G06 - COMPUTING CALCULATING COUNTING
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2476408
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Patent number 2,476,408
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G06 - COMPUTING CALCULATING COUNTING
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2161345
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Patent number 2,161,345
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G06 - COMPUTING CALCULATING COUNTING
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2134928
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Patent number 2,134,928
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G06 - COMPUTING CALCULATING COUNTING
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2127612
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Patent number 2,127,612
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G06 - COMPUTING CALCULATING COUNTING
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2118354
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Patent number 2,118,354
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G06 - COMPUTING CALCULATING COUNTING
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2095521
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Patent number 2,095,521
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Issue date Oct 12, 1937
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G06 - COMPUTING CALCULATING COUNTING
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2047942
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Patent number 2,047,942
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Issue date Jul 21, 1936
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G06 - COMPUTING CALCULATING COUNTING
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2046239
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Patent number 2,046,239
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G06 - COMPUTING CALCULATING COUNTING
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2034027
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Patent number 2,034,027
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G06 - COMPUTING CALCULATING COUNTING
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2032547
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Patent number 2,032,547
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G06 - COMPUTING CALCULATING COUNTING
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2015805
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Patent number 2,015,805
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G06 - COMPUTING CALCULATING COUNTING
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1983062
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Patent number 1,983,062
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G06 - COMPUTING CALCULATING COUNTING
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1406210
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Patent number 1,406,210
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Issue date Feb 14, 1922
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G06 - COMPUTING CALCULATING COUNTING