Pentti K. Helpio

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Uusikaupunki, FI

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Patents Grantslast 30 patents

Information Patent Grant
Freeze resistant bottom well
- Patent number 4,693,202
- Issue date Sep 15, 1987
- Rauma-Repola OY
- Pentti K. Helpio
- B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT