2239386

Information

• Patent Grant
• 2239386

• References
• Source

• Patent Number

  2,239,386

• Date Filed

  Not available

• Date Issued

  Tuesday, April 22, 1941
  83 years ago

• CPC

  • G03F5/24 - by multiple exposure

• US Classifications

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