1771844

Information

• Patent Grant
• 1771844

• References
• Source

• Patent Number

  1,771,844

• Date Filed

  Not available

• Date Issued

  Tuesday, July 29, 1930
  94 years ago

• CPC

  • G03B7/006 - setting of both diaphragm and distance

• US Classifications

  • 359 - Optical: systems and elements
  • 396 - Photography