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United States Utility Patents
4,839,930 - 4,839,939

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NumberTitle
4,839,930 Dry hydro-massage unit for a spa tank
4,839,931 Counter top waste disposal unit
4,839,932 Adjustable bed system
4,839,933 Patient transfer and conveying vehicle
4,839,934 Multiple component comforter quilt
4,839,935 Mini arched bridge
4,839,936 Automated sewer cleaning rodding machine
4,839,937 Grommet structure
4,839,938 Furniture having wheel axles concealed on one side
4,839,939 Security hinge with improved structural integrity with the electrical wires located along the pivot axis of the knuckles



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