William Chalfin

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Brooklyn, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Chip for board game
- Patent number 5,816,572
- Issue date Oct 6, 1998
- William Chalfin
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Enhanced playing chip for word games
- Patent number 5,794,933
- Issue date Aug 18, 1998
- William Chalfin
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Word forming board game with colored transparent tiles
- Patent number 5,615,886
- Issue date Apr 1, 1997
- William Chalfin
- A63 - SPORTS GAMES AMUSEMENTS