3538272

Information

• Patent Grant
• 3538272

• References
• Source

• Patent Number

  3,538,272

• Date Filed

  Not available

• Date Issued

  Tuesday, November 3, 1970
  54 years ago

• CPC

  • B61L1/164 - Mechanical
  • G08G1/02 - using treadles built into the road

• US Classifications

  • 200 - Electricity: circuit makers and breakers
  • 246 - Railway switches and signals
  • 335 - Electricity: magnetically operated switches, magnets, and electromagnets