1920906

Information

• Patent Grant
• 1920906

• References
• Source

• Patent Number

  1,920,906

• Date Filed

  Not available

• Date Issued

  Tuesday, August 1, 1933
  92 years ago

• CPC

  • E01B11/18 - Fishplates for temporarily repairing broken rails
  • G01R31/25 - Testing of vacuum tubes

• US Classifications

  • 324 - Electricity: measuring and testing