1023140

Information

• Patent Grant
• 1023140

• References
• Source

• Patent Number

  1,023,140

• Date Filed

  Not available

• Date Issued

  Tuesday, April 16, 1912
  112 years ago

• CPC

  • G04B17/24 - for the effect of variations of atmospheric pressure

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 968 - Horology