1447913

Information

• Patent Grant
• 1447913

• References
• Source

• Patent Number

  1,447,913

• Date Filed

  Not available

• Date Issued

  Tuesday, March 6, 1923
  101 years ago

• CPC

  • G01L23/14 - by electromagnetic elements

• US Classifications

  • 346 - Recorders
  • 073 - Measuring and testing