1878857

Information

• Patent Grant
• 1878857

• References
• Source

• Patent Number

  1,878,857

• Date Filed

  Not available

• Date Issued

  Tuesday, September 20, 1932
  92 years ago

• CPC

  • G03C7/06 - Manufacture of colour screens

• US Classifications

  • 359 - Optical: systems and elements
  • 430 - Radiation imagery chemistry: process, composition, or product thereof