1499078

Information

• Patent Grant
• 1499078

• References
• Source

• Patent Number

  1,499,078

• Date Filed

  Not available

• Date Issued

  Tuesday, June 24, 1924
  100 years ago

• CPC

  • G05F3/12 - being glow discharge tubes

• US Classifications

  • 323 - Electricity: power supply or regulation systems
  • 315 - Electric lamp and discharge devices: systems
  • 361 - Electricity: electrical systems and devices