John Humphrey

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Walnut, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Portable turnout system
- Patent number 7,434,768
- Issue date Oct 14, 2008
- John J. Humphrey
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Drift pin cap and method of using same
- Patent number 6,854,945
- Issue date Feb 15, 2005
- John Humphrey
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Switch heater cover support rack
- Patent number 6,571,963
- Issue date Jun 3, 2003
- John Humphrey
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Rail flange securement clamp
- Patent number 5,582,371
- Issue date Dec 10, 1996
- John Humphrey
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Switch point roller assist apparatus
- Patent number 5,501,418
- Issue date Mar 26, 1996
- John Humphrey
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES

Patents Applicationslast 30 patents

Information Patent Application
Portable turnout system
- Publication number 20060124803
- Publication date Jun 15, 2006
- John J. Humphrey
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Application
Switch heater cover support rack
- Publication number 20020060195
- Publication date May 23, 2002
- John Humphrey
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES