with a single key which transmits dots in one position and dashes in a second position

Patents Grantslast 30 patents

  • Information Patent Grant

    Mechanism to transmit text messages using ring time

    • Patent number 9,668,116
    • Issue date May 30, 2017
    • International Business Machines Corporation
    • Cristina Bonanni
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3588340

    • Patent number 3,588,340
    • Issue date Jun 28, 1971
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3431354

    • Patent number 3,431,354
    • Issue date Mar 4, 1969
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3387088

    • Patent number 3,387,088
    • Issue date Jun 4, 1968
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3369230

    • Patent number 3,369,230
    • Issue date Feb 13, 1968
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3293363

    • Patent number 3,293,363
    • Issue date Dec 20, 1966
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3243799

    • Patent number 3,243,799
    • Issue date Mar 29, 1966
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3166638

    • Patent number 3,166,638
    • Issue date Jan 19, 1965
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3160705

    • Patent number 3,160,705
    • Issue date Dec 8, 1964
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3098898

    • Patent number 3,098,898
    • Issue date Jul 23, 1963
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3087037

    • Patent number 3,087,037
    • Issue date Apr 23, 1963
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3041397

    • Patent number 3,041,397
    • Issue date Jun 26, 1962
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    3037566

    • Patent number 3,037,566
    • Issue date Jun 5, 1962
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2988597

    • Patent number 2,988,597
    • Issue date Jun 13, 1961
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2594071

    • Patent number 2,594,071
    • Issue date Apr 22, 1952
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2548835

    • Patent number 2,548,835
    • Issue date Apr 10, 1951
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2526001

    • Patent number 2,526,001
    • Issue date Oct 17, 1950
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2517538

    • Patent number 2,517,538
    • Issue date Aug 8, 1950
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2495377

    • Patent number 2,495,377
    • Issue date Jan 24, 1950
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2481091

    • Patent number 2,481,091
    • Issue date Sep 6, 1949
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2475257

    • Patent number 2,475,257
    • Issue date Jul 5, 1949
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2459027

    • Patent number 2,459,027
    • Issue date Jan 11, 1949
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    2447088

    • Patent number 2,447,088
    • Issue date Aug 17, 1948
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2437497

    • Patent number 2,437,497
    • Issue date Mar 9, 1948
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2425457

    • Patent number 2,425,457
    • Issue date Aug 12, 1947
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    2373132

    • Patent number 2,373,132
    • Issue date Apr 10, 1945
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    2329531

    • Patent number 2,329,531
    • Issue date Sep 14, 1943
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2325631

    • Patent number 2,325,631
    • Issue date Jul 27, 1943
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
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    2307480

    • Patent number 2,307,480
    • Issue date Jan 5, 1943
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2303734

    • Patent number 2,303,734
    • Issue date Dec 1, 1942
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents