Sheldon M. Retchin

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Richmond, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Recreational bone conduction audio device, system
- Patent number 8,111,860
- Issue date Feb 7, 2012
- Virginia Commonwealth University
- Sheldon M. Retchin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Recreational bone conduction audio device, system
- Patent number 7,310,427
- Issue date Dec 18, 2007
- Virginia Commonwealth University
- Sheldon M. Retchin
- A63 - SPORTS GAMES AMUSEMENTS

Patents Applicationslast 30 patents

Information Patent Application
RECREATIONAL BONE CONDUCTION AUDIO DEVICE, SYSTEM
- Publication number 20080107289
- Publication date May 8, 2008
- Sheldon M. Retchin
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Application
Recreational bone conduction audio device,system
- Publication number 20040062411
- Publication date Apr 1, 2004
- Sheldon M. Retchin
- A63 - SPORTS GAMES AMUSEMENTS