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James J. Yaworsky
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Toronto, Ontario, CA
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last 30 patents
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Patent Grant
Warfare simulating game apparatus
Patent number
4,319,754
Issue date
Mar 16, 1982
James J. Yaworsky
A63 - SPORTS GAMES AMUSEMENTS
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Patent Grant
Game apparatus with movable superimposed boards and viewing structure
Patent number
4,232,864
Issue date
Nov 11, 1980
James J. Yaworsky
A63 - SPORTS GAMES AMUSEMENTS