2159747

Information

• Patent Grant
• 2159747

• References
• Source

• Patent Number

  2,159,747

• Date Filed

  Not available

• Date Issued

  Tuesday, May 23, 1939
  85 years ago

• CPC

  • H01J17/46 - for preventing and then permitting ignition but thereafter having no control

• US Classifications

  • 313 - Electric lamp and discharge devices