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Herbert Perfahl
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Steinheim, DE
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last 30 patents
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Patent Grant
Cycloidal propeller having blades which may be set into a sailing p...
Patent number
6,065,935
Issue date
May 23, 2000
Voith Hydro GmbH & Co. KG
Herbert Perfahl
B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Patent Grant
Cycloidal propeller having wings operated by hydraulic clutches
Patent number
5,993,157
Issue date
Nov 30, 1999
Voith Hydro GmbH & Co. KG
Herbert Perfahl
B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT