2238040

Information

• Patent Grant
• 2238040

• References
• Source

• Patent Number

  2,238,040

• Date Filed

  Not available

• Date Issued

  Tuesday, April 15, 1941
  83 years ago

• CPC

  • G01S11/023 - using impedance elements varying with distance

• US Classifications

  • 361 - Electricity: electrical systems and devices
  • 180 - Motor vehicles
  • 188 - Brakes
  • 192 - Clutches and power-stop control
  • 340 - Communications: electrical