3648578

Information

• Patent Grant
• 3648578

• References
• Source

• Patent Number

  3,648,578

• Date Filed

  Not available

• Date Issued

  Tuesday, March 14, 1972
  52 years ago

• CPC

  • G03F1/88 - prepared by photographic processes for production of originals simulating relief
  • B41B21/08 - Light sources Devices associated therewith
  • B41B21/10 - Single light sources
  • G03B15/00 - Special procedures for taking photographs Apparatus therefor
  • G03F7/20 - Exposure Apparatus therefor
  • G06K15/225 - using optical plotters

• US Classifications

  • 396 - Photography
  • 347 - Incremental printing of symbolic information