1919982

Information

• Patent Grant
• 1919982

• References
• Source

• Patent Number

  1,919,982

• Date Filed

  Not available

• Date Issued

  Tuesday, July 25, 1933
  91 years ago

• CPC

  • G01C17/32 - Electron compasses

• US Classifications

  • 033 - Geometrical instruments
  • 324 - Electricity: measuring and testing
  • 340 - Communications: electrical