David R. Willis

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Wakefield, RI, US

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Patents Grantslast 30 patents

Information Patent Grant
Variable traction wheel for in-line roller skate
- Patent number 6,260,861
- Issue date Jul 17, 2001
- Mearthane Products Corporation
- Albert C. Chiang
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
In-line wheeled skate
- Patent number 5,967,552
- Issue date Oct 19, 1999
- Mearthane Products Corporation
- John A. Roderick
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
In-line wheeled skate for extreme skating
- Patent number 5,836,591
- Issue date Nov 17, 1998
- Mearthane Products Corporation
- John A. Roderick
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Variable traction wheel for in-line roller skate
- Patent number 5,829,757
- Issue date Nov 3, 1998
- Mearthane Products Corporation
- Albert C. Chiang
- A63 - SPORTS GAMES AMUSEMENTS

Patents Applicationslast 30 patents

Information Patent Application
In-line Skates, Skate Wheels and Wheel Hubs
- Publication number 20080246330
- Publication date Oct 9, 2008
- MEARTHANE PRODUCTS CORPORATION
- John A. Roderick
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Application
In-Line Skates, Skate Wheels and Wheel Hubs
- Publication number 20080191542
- Publication date Aug 14, 2008
- MEARTHANE PRODUCTS CORPORATION
- John A. Roderick
- A63 - SPORTS GAMES AMUSEMENTS