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Fred Petersen
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Hamburg, DE
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last 30 patents
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Patent Grant
Rudder rotor for watercraft and floating equipment
Patent number
4,535,714
Issue date
Aug 20, 1985
Firma Jastram-Werke GmbH KG
Fred Petersen
B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Patent Grant
Method for producing a thrust in manoeuvering engines for a watercr...
Patent number
4,316,721
Issue date
Feb 23, 1982
Jastram-Werke GmbH KG
Friedrich Weiss
B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT