2250466

Information

• Patent Grant
• 2250466

• References
• Source

• Patent Number

  2,250,466

• Date Filed

  Not available

• Date Issued

  Tuesday, July 29, 1941
  83 years ago

• CPC

  • G09B19/0007 - Signalling

• US Classifications

  • 434 - Education and demonstration
  • 368 - Horology: time measuring systems or devices