2136441

Information

• Patent Grant
• 2136441

• References
• Source

• Patent Number

  2,136,441

• Date Filed

  Not available

• Date Issued

  Tuesday, November 15, 1938
  86 years ago

• CPC

  • E21D15/38 - with longitudinally-divided upper or lower prop parts
  • H04N3/12 - by switched stationary formation of lamps, photocells or light relays

• US Classifications

  • 348 - Television
  • 315 - Electric lamp and discharge devices: systems