3503312

Information

• Patent Grant
• 3503312

• References
• Source

• Patent Number

  3,503,312

• Date Filed

  Not available

• Date Issued

  Tuesday, March 31, 1970
  54 years ago

• CPC

  • G03B27/6214 - Copy boards
  • G03B17/24 - with means for separately producing marks on the film
  • G03B2217/243 - Optical devices

• US Classifications

  • 355 - Photocopying
  • 396 - Photography