1911986

Information

• Patent Grant
• 1911986

• References
• Source

• Patent Number

  1,911,986

• Date Filed

  Not available

• Date Issued

  Tuesday, May 30, 1933
  91 years ago

• CPC

  • B61L3/065 - controlling optically
  • Y10S70/51 - Light sensitive control means

• US Classifications

  • 361 - Electricity: electrical systems and devices
  • 070 - Locks
  • 246 - Railway switches and signals
  • 250 - Radiant energy