2025580

Information

• Patent Grant
• 2025580

• References
• Source

• Patent Number

  2,025,580

• Date Filed

  Not available

• Date Issued

  Tuesday, December 24, 1935
  89 years ago

• CPC

  • G01C17/32 - Electron compasses

• US Classifications

  • 033 - Geometrical instruments
  • 324 - Electricity: measuring and testing