2155013

Information

• Patent Grant
• 2155013

• References
• Source

• Patent Number

  2,155,013

• Date Filed

  Not available

• Date Issued

  Tuesday, April 18, 1939
  86 years ago

• CPC

  • G03B41/04 - with optical compensator

• US Classifications

  • 356 - Optics: measuring and testing
  • 352 - Optics: motion pictures