2587890

Information

• Patent Grant
• 2587890

• References
• Source

• Patent Number

  2,587,890

• Date Filed

  Not available

• Date Issued

  Tuesday, March 4, 1952
  73 years ago

• CPC

  • G04C21/18 - by mechanically unlocking an electro-mechanical vibrator
  • G04C21/185 - provided with means for sheeting off or temporarity stopping the signal

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 340 - Communications: electrical