Douglass A. Wistendahl

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Bellport, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
System for converting TV content to interactive TV game program ope...
- Patent number 7,577,978
- Issue date Aug 18, 2009
- Douglass A. Wistendahl
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
System for converting media content for interactive TV use
- Patent number 6,496,981
- Issue date Dec 17, 2002
- Douglass A. Wistendahl
- G11 - INFORMATION STORAGE
Information Patent Grant
System for mapping hot spots in media content for interactive digit...
- Patent number 5,708,845
- Issue date Jan 13, 1998
- Douglass A. Wistendahl
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
System for converting existing TV content to interactive TV program...
- Publication number 20020056136
- Publication date May 9, 2002
- Douglass A. Wistendahl
- G06 - COMPUTING CALCULATING COUNTING