2178933

Information

• Patent Grant
• 2178933

• References
• Source

• Patent Number

  2,178,933

• Date Filed

  Not available

• Date Issued

  Tuesday, November 7, 1939
  85 years ago

• CPC

  • G03B27/581 - in copying cameras

• US Classifications

  • 430 - Radiation imagery chemistry: process, composition, or product thereof
  • 033 - Geometrical instruments
  • 076 - Metal tools and implements, making