HY-MAC LIMITED

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LONDON, GB

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for breaking up a layer of substantially rigid material
- Patent number 4,153,301
- Issue date May 8, 1979
- Hy-Mac Limited
- Anthony C. Armstrong
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Hydraulically operated shovels
- Patent number 3,952,890
- Issue date Apr 27, 1976
- Hy-Mac Limited
- Anthony Clubley Armstrong
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING