1830637

Information

• Patent Grant
• 1830637

• References
• Source

• Patent Number

  1,830,637

• Date Filed

  Not available

• Date Issued

  Tuesday, November 3, 1931
  93 years ago

• CPC

  • G03C7/06 - Manufacture of colour screens

• US Classifications

  • 430 - Radiation imagery chemistry: process, composition, or product thereof
  • 396 - Photography