1721681

Information

• Patent Grant
• 1721681

• References
• Source

• Patent Number

  1,721,681

• Date Filed

  Not available

• Date Issued

  Tuesday, July 23, 1929
  95 years ago

• CPC

  • H01G9/16 - specially for use as rectifiers or detectors

• US Classifications

  • 361 - Electricity: electrical systems and devices