David M. Johnson

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Matlock, GB

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Patents Grantslast 30 patents

Information Patent Grant
Maintenance vehicle and method for measuring and maintaining the le...
- Patent number 5,605,099
- Issue date Feb 25, 1997
- Pandrol Jackson, Inc.
- Dennis A. Sroka
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Method of producing a contoured work surface
- Patent number 5,005,652
- Issue date Apr 9, 1991
- John Kelly (Lasers) Limited
- David M. Johnson
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING