1929731

Information

• Patent Grant
• 1929731

• References
• Source

• Patent Number

  1,929,731

• Date Filed

  Not available

• Date Issued

  Tuesday, October 10, 1933
  91 years ago

• CPC

  • G04B19/24386 - sheet-shaped

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 122 - Liquid heaters and vaporizers
  • 368 - Horology: time measuring systems or devices
  • 968 - Horology