1819310

Information

• Patent Grant
• 1819310

• References
• Source

• Patent Number

  1,819,310

• Date Filed

  Not available

• Date Issued

  Tuesday, August 18, 1931
  93 years ago

• CPC

  • G01C17/24 - Illumination

• US Classifications

  • 033 - Geometrical instruments
  • 362 - Illumination