1731712

Information

• Patent Grant
• 1731712

• References
• Source

• Patent Number

  1,731,712

• Date Filed

  Not available

• Date Issued

  Tuesday, October 15, 1929
  95 years ago

• CPC

  • G04B39/004 - from a material other than glass

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 968 - Horology
  • D10 - Measuring, testing, or signalling instruments
  • D11 - Jewelry, symbolic insignia, and ornaments