3136858

Information

• Patent Grant
• 3136858

• References
• Source

• Patent Number

  3,136,858

• Date Filed

  Not available

• Date Issued

  Tuesday, June 9, 1964
  60 years ago

• CPC

  • H04M1/667 - Preventing unauthorised calls from a telephone set
  • Y10S70/72 - Telephone lock

• US Classifications

  • 379 - Telephonic communications
  • 070 - Locks
  • 368 - Horology: time measuring systems or devices