2292623

Information

• Patent Grant
• 2292623

• References
• Source

• Patent Number

  2,292,623

• Date Filed

  Not available

• Date Issued

  Tuesday, August 11, 1942
  82 years ago

• CPC

  • G01J1/4219 - specially adapted for enlargers

• US Classifications

  • 356 - Optics: measuring and testing
  • 324 - Electricity: measuring and testing
  • D16 - Photography and optical equipment