John J. Grey

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Berea, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Bolt-nut assembly for railroad crossing frogs
- Patent number 5,603,661
- Issue date Feb 18, 1997
- Barnes Group, Inc.
- John J. Grey
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Bolt-nut assembly for railroad crossing frogs
- Patent number 5,413,442
- Issue date May 9, 1995
- Barnes Group, Inc.
- John J. Grey
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES