3687544

Information

• Patent Grant
• 3687544

• References
• Source

• Patent Number

  3,687,544

• Date Filed

  Not available

• Date Issued

  Tuesday, August 29, 1972
  52 years ago

• CPC

  • G03G15/041 - with variable magnification
  • G03B27/36 - by mechanical connections
  • G03B27/40 - adapted for use with lenses of different focal length

• US Classifications

  • 355 - Photocopying