David Christianson

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Grayslake, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Toys with sensors generally
- Patent number 6,616,502
- Issue date Sep 9, 2003
- Elizabeth Pacza-Steim
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Interactive talking doll
- Patent number 6,135,845
- Issue date Oct 24, 2000
- Randall Jon Klimpert
- A63 - SPORTS GAMES AMUSEMENTS

Patents Applicationslast 30 patents

Information Patent Application
TOYS WITH SENSORS GENERALLY
- Publication number 20030157865
- Publication date Aug 21, 2003
- Meyer/Glass Design
- Elizabeth Pacza-Steim
- A63 - SPORTS GAMES AMUSEMENTS