2311071

Information

• Patent Grant
• 2311071

• References
• Source

• Patent Number

  2,311,071

• Date Filed

  Not available

• Date Issued

  Tuesday, February 16, 1943
  81 years ago

• CPC

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

• US Classifications

  • 359 - Optical: systems and elements