3914877

Information

• Patent Grant
• 3914877

• References
• Source

• Patent Number

  3,914,877

• Date Filed

  Not available

• Date Issued

  Tuesday, October 28, 1975
  49 years ago

• CPC

  • H04N1/448 - Rendering the image unintelligible
  • G07C9/00055 - visually
  • G09C5/00 - Ciphering apparatus or methods not provided for in the preceding groups

• US Classifications

  • 380 - Cryptography