1742658

Information

• Patent Grant
• 1742658

• References
• Source

• Patent Number

  1,742,658

• Date Filed

  Not available

• Date Issued

  Tuesday, January 7, 1930
  95 years ago

• CPC

  • G03F5/24 - by multiple exposure
  • Y10S430/152 - Making camera copy

• US Classifications

  • 355 - Photocopying
  • 430 - Radiation imagery chemistry: process, composition, or product thereof