2146981

Information

• Patent Grant
• 2146981

• References
• Source

• Patent Number

  2,146,981

• Date Filed

  Not available

• Date Issued

  Tuesday, February 14, 1939
  86 years ago

• CPC

  • G04B19/2532 - automatically corrected at the end of mounths having less than 31 days

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 968 - Horology