1539781

Information

• Patent Grant
• 1539781

• References
• Source

• Patent Number

  1,539,781

• Date Filed

  Not available

• Date Issued

  Tuesday, May 26, 1925
  99 years ago

• CPC

  • G04B37/125 - allowing note taking

• US Classifications

  • 224 - Package and article carriers
  • 063 - Jewelry
  • 368 - Horology: time measuring systems or devices
  • 968 - Horology
  • D10 - Measuring, testing, or signalling instruments