2540089

Information

• Patent Grant
• 2540089

• References
• Source

• Patent Number

  2,540,089

• Date Filed

  Not available

• Date Issued

  Tuesday, February 6, 1951
  73 years ago

• CPC

  • G08G1/01 - Detecting movement of traffic to be counted or controlled
  • B61L13/002 - actuated by the passage of the vehicle
  • G01S1/02 - using radio waves

• US Classifications

  • 342 - Communications: directive radio wave systems and devices