2304988

Information

• Patent Grant
• 2304988

• References
• Source

• Patent Number

  2,304,988

• Date Filed

  Not available

• Date Issued

  Tuesday, December 15, 1942
  82 years ago

• CPC

  • G03F5/16 - using grey half-tone screens
  • G03F5/18 - using colour half-tone screens

• US Classifications

  • 355 - Photocopying