878456

Information

• Patent Grant
• 878456

• References
• Source

• Patent Number

  878,456

• Date Filed

  Not available

• Date Issued

  Tuesday, February 4, 1908
  117 years ago

• CPC

  • G01N21/534 - by measuring transmission alone
  • Y10S200/16 - Gas detector

• US Classifications

  • 356 - Optics: measuring and testing
  • 200 - Electricity: circuit makers and breakers
  • 236 - Automatic temperature and humidity regulation
  • 250 - Radiant energy
  • 340 - Communications: electrical