Luitzen B. Koopmans

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2964 AC Groot-Ammers, NL

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Patents Grantslast 30 patents

Information Patent Grant
Winch system having hydraulic transmission including a safety circuit
- Patent number 4,727,718
- Issue date Mar 1, 1988
- Luitzen B. Koopmans
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Displaceable winch device
- Patent number 4,441,690
- Issue date Apr 10, 1984
- Luitzen B. Koopmans
- B66 - HOISTING LIFTING HAULING