TREA

Typewriters for ciphering or deciphering cryptographic text

Follow

Industry

  • CPC
  • G09C3/00
This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

GPHYSICS G09Cryptography, education, displays G09CCODING OR CIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY

Current Industry

G09C3/00Typewriters for ciphering or deciphering cryptographic text

Sub Industries

G09C3/02with auxiliary keys or keyboards acting on the original key or keyboards G09C3/04wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member G09C3/06the connections being mechanical G09C3/08the connections being electrical G09C3/10involving removable or interchangeable coding members
Industries