Hartley P. Dermond

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S. Venice, FL, US

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Patents Grantslast 30 patents

Information Patent Grant
Earth and road roller with oppositely skewed tandem steering drums
- Patent number 4,046,485
- Issue date Sep 6, 1977
- Clark; William H.
- Hartley P. Dermond
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Ditch-shaping roll and attachment for a road vehicle
- Patent number 4,039,265
- Issue date Aug 2, 1977
- Clark; William H.
- Hartley P. Dermond
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING