3904291

Information

• Patent Grant
• 3904291

• References
• Source

• Patent Number

  3,904,291

• Date Filed

  Not available

• Date Issued

  Tuesday, September 9, 1975
  49 years ago

• CPC

  • G03B27/06 - for automatic repeated copying of the same original
  • H05K3/0082 - characterised by the exposure method of radiation-sensitive masks

• US Classifications

  • 355 - Photocopying
  • 396 - Photography