1445131

Information

• Patent Grant
• 1445131

• References
• Source

• Patent Number

  1,445,131

• Date Filed

  Not available

• Date Issued

  Tuesday, February 13, 1923
  102 years ago

• CPC

  • G01C17/24 - Illumination

• US Classifications

  • 250 - Radiant energy
  • 033 - Geometrical instruments