actuated by variation of resistance or by piezo-electricity

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Patents Grantslast 30 patents

Information Patent Grant
Electronic circuit controller for railway switch machine, railway s...
- Patent number 10,953,897
- Issue date Mar 23, 2021
- HITACHI RAIL STS USA, INC.
- Kevin Mcquistian
- B61 - RAILWAYS
Information Patent Grant
Magnetic rail shunt with variable resistor
- Patent number 10,822,003
- Issue date Nov 3, 2020
- ALSTOM TRANSPORT TECHNOLOGIES
- Pier-Alessandro Aisa
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Methods and systems for alerting a user to the presence of a fault...
- Patent number 10,435,048
- Issue date Oct 8, 2019
- THALES HOLDINGS UK PLC
- William Saunders
- B61 - RAILWAYS
Information Patent Grant
Railway wheel sensors
- Patent number 5,129,606
- Issue date Jul 14, 1992
- JDR Systems Corporation
- James D. Rodems
- B61 - RAILWAYS
Information Patent Grant
Differential clamp-on railway vehicle wheel detector
- Patent number 4,200,856
- Issue date Apr 29, 1980
- Westinghouse Air Brake Company
- Heinz Gilcher
- G01 - MEASURING TESTING
Information Patent Grant
3812345
- Patent number 3,812,345
- Issue date May 21, 1974
- B61 - RAILWAYS
Information Patent Grant
3581084
- Patent number 3,581,084
- Issue date May 25, 1971
- B61 - RAILWAYS
Information Patent Grant
2817009
- Patent number 2,817,009
- Issue date Dec 17, 1957
- B61 - RAILWAYS
Information Patent Grant
1814465
- Patent number 1,814,465
- Issue date Jul 14, 1931
- B61 - RAILWAYS