2841658

Information

• Patent Grant
• 2841658

• References
• Source

• Patent Number

  2,841,658

• Date Filed

  Not available

• Date Issued

  Tuesday, July 1, 1958
  66 years ago

• CPC

  • H04M1/667 - Preventing unauthorised calls from a telephone set
  • Y10S70/72 - Telephone lock
  • Y10T70/5562 - Removable

• US Classifications

  • 379 - Telephonic communications
  • 070 - Locks