3744891

Information

• Patent Grant
• 3744891

• References
• Source

• Patent Number

  3,744,891

• Date Filed

  Not available

• Date Issued

  Tuesday, July 10, 1973
  50 years ago

• CPC

  • G03B27/6292 - Handling microfiche
  • G05D3/1454 - using models or predicting devices

• US Classifications

  • 353 - Optics: image projectors
  • 033 - Geometrical instruments
  • 355 - Photocopying