2271539

Information

• Patent Grant
• 2271539

• References
• Source

• Patent Number

  2,271,539

• Date Filed

  Not available

• Date Issued

  Tuesday, February 3, 1942
  83 years ago

• CPC

  • G04G9/0058 - using a cathode ray tube as display device

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 340 - Communications: electrical
  • 968 - Horology