1806051

Information

• Patent Grant
• 1806051

• References
• Source

• Patent Number

  1,806,051

• Date Filed

  Not available

• Date Issued

  Tuesday, May 19, 1931
  93 years ago

• CPC

  • B61L5/1845 - Optical systems, lenses

• US Classifications

  • 340 - Communications: electrical
  • 362 - Illumination