1901639

Information

• Patent Grant
• 1901639

• References
• Source

• Patent Number

  1,901,639

• Date Filed

  Not available

• Date Issued

  Tuesday, March 14, 1933
  91 years ago

• CPC

  • H01H33/6683 - by gettering

• US Classifications

  • 218 - High-voltage switches with arc preventing or extinguishing devices