2494187

Information

• Patent Grant
• 2494187

• References
• Source

• Patent Number

  2,494,187

• Date Filed

  Not available

• Date Issued

  Tuesday, January 10, 1950
  75 years ago

• CPC

  • G03B21/18 - Fire preventing or extinguishing
  • Y10S242/913 - Safety device

• US Classifications

  • 352 - Optics: motion pictures
  • 200 - Electricity: circuit makers and breakers
  • 242 - Winding, tensioning, or guiding