S. Grant Christison

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Bellingham, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
Constant tension hoisting member
- Patent number 4,928,925
- Issue date May 29, 1990
- S. Grant Christison
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Constant tension hoisting system
- Patent number 4,624,450
- Issue date Nov 25, 1986
- PACCAR Inc.
- S. Grant Christison
- B66 - HOISTING LIFTING HAULING