3919689

Information

• Patent Grant
• 3919689

• References
• Source

• Patent Number

  3,919,689

• Date Filed

  Not available

• Date Issued

  Tuesday, November 11, 1975
  49 years ago

• CPC

  • G01P3/4805 - by using circuits for the electrical integration of the generated pulses
  • B60Q1/54 - for indicating speed outside of the vehicle
  • G01P1/08 - Arrangements of scales, pointers, lamps or acoustic indicators
  • G01P1/103 - by comparing the value of the measured signal with one or several reference values

• US Classifications

  • 340 - Communications: electrical
  • 180 - Motor vehicles