Douglas A. Johnson

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Fargo, ND, US

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Patents Grantslast 30 patents

Information Patent Grant
Water rehabilitation device
- Patent number 6,540,647
- Issue date Apr 1, 2003
- Robert J. Spooner
- A63 - SPORTS GAMES AMUSEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Water rehabilitation device
- Publication number 20020132708
- Publication date Sep 19, 2002
- Robert J. Spooner
- A63 - SPORTS GAMES AMUSEMENTS