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