3844657

Information

• Patent Grant
• 3844657

• References
• Source

• Patent Number

  3,844,657

• Date Filed

  Not available

• Date Issued

  Tuesday, October 29, 1974
  50 years ago

• CPC

  • G03B27/18 - Maintaining or producing contact pressure between original and light-sensitive material
  • G03B27/02 - Exposure apparatus for contact printing

• US Classifications

  • 355 - Photocopying
  • 015 - Brushing, scrubbing, and general cleaning
  • 396 - Photography
  • 430 - Radiation imagery chemistry: process, composition, or product thereof