1767609

Information

• Patent Grant
• 1767609

• References
• Source

• Patent Number

  1,767,609

• Date Filed

  Not available

• Date Issued

  Tuesday, June 24, 1930
  94 years ago

• CPC

  • B61L3/065 - controlling optically

• US Classifications

  • 246 - Railway switches and signals
  • 250 - Radiant energy
  • 315 - Electric lamp and discharge devices: systems
  • 361 - Electricity: electrical systems and devices