David J. Spiegler

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Chicago, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Ball skill enhancement training programs and methods
- Patent number 9,149,698
- Issue date Oct 6, 2015
- Virberu L.L.C.
- David J. Spiegler
- A63 - SPORTS GAMES AMUSEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Ball Skill Enhancement Training Programs and Methods
- Publication number 20130150188
- Publication date Jun 13, 2013
- Virberu L.L.C.
- David J. Spiegler
- A63 - SPORTS GAMES AMUSEMENTS