3787890

Information

• Patent Grant
• 3787890

• References
• Source

• Patent Number

  3,787,890

• Date Filed

  Not available

• Date Issued

  Tuesday, January 22, 1974
  51 years ago

• CPC

  • G04D7/1221 - with recording

• US Classifications

  • 346 - Recorders
  • 335 - Electricity: magnetically operated switches, magnets, and electromagnets
  • 968 - Horology