3668998

Information

• Patent Grant
• 3668998

• References
• Source

• Patent Number

  3,668,998

• Date Filed

  Not available

• Date Issued

  Tuesday, June 13, 1972
  52 years ago

• CPC

  • F21V33/0088 - Ventilating systems
  • Y10T137/0947 - With servo connection to valve

• US Classifications

  • 454 - Ventilation
  • 137 - Fluid handling
  • 362 - Illumination