3647297

Information

• Patent Grant
• 3647297

• References
• Source

• Patent Number

  3,647,297

• Date Filed

  Not available

• Date Issued

  Tuesday, March 7, 1972
  52 years ago

• CPC

  • G01J1/4219 - specially adapted for enlargers
  • G01J1/42 - using electric radiation detectors

• US Classifications

  • 355 - Photocopying