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Kerb climbing device
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Patent number 4,811,966
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Issue date Mar 14, 1989
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The Spastics Society
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John M. Singleton
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Wheelchair
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Patent number 4,805,712
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Issue date Feb 21, 1989
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The Spastics Society
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John M. Singleton
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B60 - VEHICLES IN GENERAL
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Lightweight foldable wheelchair
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Patent number 4,805,931
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Issue date Feb 21, 1989
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The Spastics Society
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James F. Slasor
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Wheelchairs
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Patent number 4,140,192
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Issue date Feb 20, 1979
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The Spastics Society
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John W. Sharpe
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Wheel chairs
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Patent number 3,955,639
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Issue date May 11, 1976
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The Spastics Society
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Harold Cragg
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B60 - VEHICLES IN GENERAL