1837897

Information

• Patent Grant
• 1837897

• References
• Source

• Patent Number

  1,837,897

• Date Filed

  Not available

• Date Issued

  Tuesday, December 22, 1931
  93 years ago

• CPC

  • H05B31/0039 - Projectors, the construction of which depends upon the presence of the arc
  • H05B31/009 - with tightening devices

• US Classifications

  • 314 - Electric lamp and discharge devices: consumable electrodes
  • 475 - Planetary gear transmission systems or components