Jack S. Knackstedt

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London, GB

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Patents Grantslast 30 patents

Information Patent Grant
Connector
- Patent number 4,955,779
- Issue date Sep 11, 1990
- Drazil; Jaromir Vaclav
- Jack S. Knackstedt
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Material working machine with vibrating tool carrier
- Patent number 4,679,337
- Issue date Jul 14, 1987
- Drazil; Jaromir Vaclav
- Frederick A. Carternock
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING