John Graham MacDonald

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Goderich, CA

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Patents Grantslast 30 patents

Information Patent Grant
Motor grader with bar linkage blade positioning apparatus
- Patent number 4,340,119
- Issue date Jul 20, 1982
- Champion Road Machinery Limited
- Jack G. MacDonald
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Adjustable hydraulic control system for a motor grader
- Patent number 3,965,771
- Issue date Jun 29, 1976
- Dominion Road Machinery Co. Limited
- John Graham MacDonald
- B60 - VEHICLES IN GENERAL