1823243

Information

• Patent Grant
• 1823243

• References
• Source

• Patent Number

  1,823,243

• Date Filed

  Not available

• Date Issued

  Tuesday, September 15, 1931
  93 years ago

• CPC

  • G03C7/14 - Additive processes using lenticular screens Materials therefor Preparing or processing such materials
  • B44B3/00 - Artist's machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two- dimensionally for carving, engraving, or guilloching shallow ornamenting or markings
  • B44B3/04 - wherein non-plane surfaces are worked
  • G03B21/32 - Details specially adapted for motion-picture projection
  • B44B2700/025 - for engraving a surface of revolution

• US Classifications

  • 451 - Abrading
  • 076 - Metal tools and implements, making
  • 470 - Threaded, headed fastener, or washer making: process and apparatus