Sven Ingvar Astrand

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S-151 50 Sodertalje, SW

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Patents Grantslast 30 patents

Information Patent Grant
Propellers with retractable blades
- Patent number 4,086,025
- Issue date Apr 25, 1978
- Sven Ingvar Astrand
- B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT