1809817

Information

• Patent Grant
• 1809817

• References
• Source

• Patent Number

  1,809,817

• Date Filed

  Not available

• Date Issued

  Tuesday, June 16, 1931
  93 years ago

• CPC

  • G03B21/18 - Fire preventing or extinguishing
  • Y10S200/11 - Web or thread actuated

• US Classifications

  • 352 - Optics: motion pictures
  • 200 - Electricity: circuit makers and breakers