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Jonathan Hartzell
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Austin, TX, US
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last 30 patents
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Patent Grant
Sequential attitude-responsive enclosure puzzle
Patent number
5,944,311
Issue date
Aug 31, 1999
Jonathan Hartzell
A63 - SPORTS GAMES AMUSEMENTS
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Patent Grant
Sock tagging device and method
Patent number
5,467,510
Issue date
Nov 21, 1995
Jonathan Hartzell
A41 - WEARING APPAREL