2590027

Information

• Patent Grant
• 2590027

• References
• Source

• Patent Number

  2,590,027

• Date Filed

  Not available

• Date Issued

  Tuesday, March 18, 1952
  72 years ago

• CPC

  • G04F3/022 - using mechanical signalling device
  • G04B21/005 - Periodical acoustic signalling arrangements

• US Classifications

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