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D. Mason Allen
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Altamonte Springs, FL, US
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last 30 patents
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Patent Grant
Skateboard
Patent number
4,887,825
Issue date
Dec 19, 1989
D. Mason Allen
A63 - SPORTS GAMES AMUSEMENTS
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Patent Grant
Water level control
Patent number
4,853,986
Issue date
Aug 8, 1989
The Awareness Marketing Corporation
D. Mason Allen
E04 - BUILDING