3854792

Information

• Patent Grant
• 3854792

• References
• Source

• Patent Number

  3,854,792

• Date Filed

  Not available

• Date Issued

  Tuesday, December 17, 1974
  50 years ago

• CPC

  • G09F3/0376 - using a special technique to detect tampering
  • Y10T70/8243 - With seal

• US Classifications

  • 385 - Optical waveguides
  • 070 - Locks