1908971

Information

• Patent Grant
• 1908971

• References
• Source

• Patent Number

  1,908,971

• Date Filed

  Not available

• Date Issued

  Tuesday, May 16, 1933
  92 years ago

• CPC

  • G01C17/24 - Illumination

• US Classifications

  • 033 - Geometrical instruments
  • 362 - Illumination