2780050

Information

• Patent Grant
• 2780050

• References
• Source

• Patent Number

  2,780,050

• Date Filed

  Not available

• Date Issued

  Tuesday, February 5, 1957
  68 years ago

• CPC

  • G04B37/0033 - with cover or bottom which can slide or turn (without a spring action)

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 968 - Horology
  • D10 - Measuring, testing, or signalling instruments