1718228

Information

• Patent Grant
• 1718228

• References
• Source

• Patent Number

  1,718,228

• Date Filed

  Not available

• Date Issued

  Tuesday, June 25, 1929
  95 years ago

• CPC

  • G04B39/002 - made of glass

• US Classifications

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