1990728

Information

• Patent Grant
• 1990728

• References
• Source

• Patent Number

  1,990,728

• Date Filed

  Not available

• Date Issued

  Tuesday, February 12, 1935
  89 years ago

• CPC

  • H01J1/00 - Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
  • H01J2893/0051 - Anode assemblies screens for influencing the discharge

• US Classifications

  • 313 - Electric lamp and discharge devices