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| Patents for B62M 29 - Ground-engaging propulsion devices for cycles, sledges, or rider-propelled wheeled vehicles, not otherwise provided for (216) |
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| 05/09/1989 | US4828280 Ice bike | | 08/02/1988 | US4761013 User propelled vehicle | | 02/03/1988 | CN87204235U Bycicle accelerating device by manpower | | 01/19/1988 | US4719983 Device and attendant equipment for converting a motor-scooter into a vehicle suitable for operating on snowy ground | | 12/03/1987 | WO1987007167A1 Human energy transmission device | | 11/04/1987 | CN87202927U Bicycle taking advantage of inertia | | 10/03/1987 | CN86206540U Bicycle with hydraulic feed-back device of vibrating energy and inertial energy | | 02/04/1987 | CN86203571U Manual driving booster | | 01/24/1987 | CN86103236A Auxiliary driving unit for bicycle | | 01/17/1987 | CN85102408A Manual drive vehicle series by means of the rope transmission | | 08/20/1986 | CN85100785A Automatic driving-force adding bicycle | | 05/14/1986 | CN85201245U Simply constructed motor bicycle | | 08/21/1984 | US4466626 For travel over ice or snow covered terrain | | 12/20/1983 | US4421193 Tread powered ski | | 04/29/1980 | US4200304 Twisting car | | 06/01/1976 | US3960387 Manually propelled toy snow vehicle |
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