2194521

Information

• Patent Grant
• 2194521

• References
• Source

• Patent Number

  2,194,521

• Date Filed

  Not available

• Date Issued

  Tuesday, March 26, 1940
  85 years ago

• CPC

  • H04M1/667 - Preventing unauthorised calls from a telephone set
  • Y10S70/58 - Handle guard
  • Y10T70/30 - Hasp
  • Y10T70/5757 - Handle, handwheel or knob
  • Y10T70/5765 - Rotary or swinging
  • Y10T70/8297 - For combination-operated mechanism

• US Classifications

  • 379 - Telephonic communications
  • 070 - Locks