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Adjustable crutch
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Patent number 9,387,144
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Issue date Jul 12, 2016
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Renato Brignone
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Sit-ski
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Patent number 6,036,202
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Issue date Mar 14, 2000
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Kenneth Paul LaCome
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A63 - SPORTS GAMES AMUSEMENTS
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Adaptive monoski frame
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Patent number 6,019,380
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Issue date Feb 1, 2000
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Michael L. Goodman
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A63 - SPORTS GAMES AMUSEMENTS
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Sports conveyance
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Patent number 5,551,717
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Issue date Sep 3, 1996
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John De Courcey Milne
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A63 - SPORTS GAMES AMUSEMENTS
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Pole propelled land vehicle
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Patent number 5,098,087
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Issue date Mar 24, 1992
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Curtis L. Matile
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Support seat for a ski
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Patent number 4,865,572
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Issue date Sep 12, 1989
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Royce C. Andes
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Ski for the handicapped
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Patent number 4,632,408
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Issue date Dec 30, 1986
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GFL Formteile-und Larmschutz Technik GmbH & Co.
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Hans Olpp
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A63 - SPORTS GAMES AMUSEMENTS
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Ski-equipped crutch
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Patent number 3,948,535
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Issue date Apr 6, 1976
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Nippon Gakki Seizo Kabushiki Kaisha
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Takafusa Negi
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A63 - SPORTS GAMES AMUSEMENTS
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3868122
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Patent number 3,868,122
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Issue date Feb 25, 1975
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A63 - SPORTS GAMES AMUSEMENTS
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3738674
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Patent number 3,738,674
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Issue date Jun 12, 1973
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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3528674
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Patent number 3,528,674
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Issue date Sep 15, 1970
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A63 - SPORTS GAMES AMUSEMENTS