2337534

Information

• Patent Grant
• 2337534

• References
• Source

• Patent Number

  2,337,534

• Date Filed

  Not available

• Date Issued

  Tuesday, December 28, 1943
  81 years ago

• CPC

  • G01J1/14 - using comparison with a surface of graded brightness

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 346 - Recorders
  • 356 - Optics: measuring and testing
  • 430 - Radiation imagery chemistry: process, composition, or product thereof