with optical sensing means

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    3431426

    • Patent number 3,431,426
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    • G06 - COMPUTING CALCULATING COUNTING
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    3270145

    • Patent number 3,270,145
    • Issue date Aug 30, 1966
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3185911

    • Patent number 3,185,911
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    • G06 - COMPUTING CALCULATING COUNTING
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    3045125

    • Patent number 3,045,125
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    • G06 - COMPUTING CALCULATING COUNTING
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    3018332

    • Patent number 3,018,332
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    2980227

    • Patent number 2,980,227
    • Issue date Apr 18, 1961
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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    2916624

    • Patent number 2,916,624
    • Issue date Dec 8, 1959
    • G06 - COMPUTING CALCULATING COUNTING
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    2762931

    • Patent number 2,762,931
    • Issue date Sep 11, 1956
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    2727943

    • Patent number 2,727,943
    • Issue date Dec 20, 1955
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    2724014

    • Patent number 2,724,014
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    2721229

    • Patent number 2,721,229
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    2667535

    • Patent number 2,667,535
    • Issue date Jan 26, 1954
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    • Patent number 2,586,711
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    • Issue date Dec 28, 1948
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    2397202

    • Patent number 2,397,202
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    2281596

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    2278485

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    2274737

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    2234832

    • Patent number 2,234,832
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    2057773

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