Douglas E. Roskelley

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Woodinville, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
Davit with low level of dynamicism
- Patent number 5,170,742
- Issue date Dec 15, 1992
- Olsson; Samuel F.
- Douglas E. Roskelley
- B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT