TREA

with auxiliary keys or keyboards acting on the original key or keyboards

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Industry

  • CPC
  • G09C3/02
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Parent Industries

GPHYSICS G09Cryptography, education, displays G09CCODING OR CIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY G09C3/00Typewriters for ciphering or deciphering cryptographic text

Current Industry

G09C3/02with auxiliary keys or keyboards acting on the original key or keyboards
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    2515492
    • Patent number 2,515,492
    • Issue date Jul 18, 1950
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    2435130
    • Patent number 2,435,130
    • Issue date Jan 27, 1948
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    2171470
    • Patent number 2,171,470
    • Issue date Aug 29, 1939
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    2138639
    • Patent number 2,138,639
    • Issue date Nov 29, 1938
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    2116732
    • Patent number 2,116,732
    • Issue date May 10, 1938
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    2116733
    • Patent number 2,116,733
    • Issue date May 10, 1938
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    2116683
    • Patent number 2,116,683
    • Issue date May 10, 1938
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    2116731
    • Patent number 2,116,731
    • Issue date May 10, 1938
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    2074058
    • Patent number 2,074,058
    • Issue date Mar 16, 1937
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    1949140
    • Patent number 1,949,140
    • Issue date Feb 27, 1934
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    1857374
    • Patent number 1,857,374
    • Issue date May 10, 1932
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    1562120
    • Patent number 1,562,120
    • Issue date Nov 17, 1925
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    1523689
    • Patent number 1,523,689
    • Issue date Jan 20, 1925
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    1414496
    • Patent number 1,414,496
    • Issue date May 2, 1922
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS