| Patents for B62K 13 - Cycles convertible to, or transformable into, other types of cycles or land vehicles (1,539) |
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| 03/11/1992 | CN2098443U Multi-purpose combined bicycle |
| 02/11/1992 | US5086866 Motorcycle having body height adjustor |
| 01/08/1992 | CN2092483U Replaceable combination padicab |
| 12/25/1991 | CN2091265U Two-purpose bicycle |
| 12/17/1991 | US5072961 Bicycle with universal adjustable frame |
| 12/03/1991 | US5069469 Recumbent cycle |
| 11/27/1991 | CN2089444U 多功能自行车 Multifunction Bicycle |
| 11/26/1991 | US5067738 Child powered bicycle trailer |
| 11/20/1991 | CN2088967U Combined children's cycle |
| 11/06/1991 | CN2088075U Tricycle |
| 09/04/1991 | CN2084032U Body building bicycle |
| 09/04/1991 | CN1054224A Multipurpose foldable pram with saddle control |
| 06/06/1991 | DE3939446A1 Motorcycle raft attachment - has base plate holding motorcycle with driven rubber roller, and bladed drive rollers |
| 05/16/1991 | DE3937368A1 BIcycle frame with variable suspension characteristics - has area between seat tube, rear wheel fork and rear wheel strut varied by attaching rear fork strut at different heights on seat tube |
| 05/15/1991 | EP0427269A1 Motorcycle having body height adjusting mechanism |
| 05/02/1991 | EP0425273A1 Motorcycle having body height adjusting mechanism |
| 05/02/1991 | EP0424942A1 Motorcycle having body height adjustor |
| 05/02/1991 | EP0424918A1 Fully adjustable motorcycle |
| 02/20/1991 | CN2071600U Accessories for bicycle travelling on water |
| 01/29/1991 | CA1279683C Endless track attachment for a wheeled vehicle |
| 01/23/1991 | CN2069829U Multi-purpose combination cycle |
| 01/17/1991 | DE3921817A1 Double bicycle with side by side seating - is formed from two bicycles connected by cross-bars |
| 12/05/1990 | CN2066834U Composite tricycle |
| 10/11/1990 | DE3910797A1 Stable small vehicle |
| 10/10/1990 | EP0391282A2 Snow vehicle |
| 09/25/1990 | US4958842 Convertible toy kit |
| 09/19/1990 | CN2062312U Conjuncted bicycle mamber |
| 06/13/1990 | CN2058159U Multi-purpose combined twin-frame bicycle |
| 05/10/1990 | DE3837018A1 Variable standing-recumbent bicycle |
| 05/09/1990 | CN2056912U Double-drive quadricycle |
| 05/08/1990 | CA1268803A1 Endless articulated steel band vehicle for off-road services |
| 05/03/1990 | DE3837185A1 Foldable and easily disassembled, multifunctional convertible sports and leisure equipment for muscular-powered or motor-driven rolling and sliding locomotion along the road, off-road, on water, snow and ice and as a stand for stationary use |
| 05/02/1990 | CN2056656U Wheel-chare cycle |
| 04/11/1990 | EP0362912A1 Vertically adjustable vehicle |
| 03/22/1990 | DE3831629A1 Apparatus for motor-drive of bicycles |
| 03/20/1990 | US4909537 Universal vehicle for pedaling or the like |
| 03/20/1990 | US4909525 Convertible personal vehicle having a take-apart frame |
| 03/14/1990 | CN2054426U Multi-functional bicycle |
| 03/06/1990 | US4905787 Rear wheel drive mechanism for a motorcycle |
| 01/23/1990 | US4895379 Convertible tricycle/riding toy |
| 01/17/1990 | CN2051208U Combined pram for pushing and riding |
| 12/27/1989 | CN2050022U Dual-purpose folding bicycle for riding and pushing |
| 10/18/1989 | CN2046102U Dual purpose bicycle driven by wire rope |
| 10/18/1989 | CN2046101U Multifunction foldable acoustical analogue children bicycle with two seats |
| 08/09/1989 | CN2042445U Light combined multi-purpose bicycle |
| 08/02/1989 | CN2042052U Combined passenger-carrying bicycle |
| 08/02/1989 | CN2042050U Bicycle capable of being rapidly refitted into a tricycle |
| 07/13/1989 | DE3744774A1 Combination bicycle and wheelchair - has bicycle fork extended forward at bottom to accommodate axle bracket |
| 07/12/1989 | CN2040873U Combined mother-and-son's cycle |
| 06/14/1989 | CN2039295U Triple-purpose combined bicycle |
| 06/13/1989 | CA1255516A1 Rear wheel drive mechanism for a motorcycle |
| 05/31/1989 | CN2038471U Passenger-cargo dual purpose tricycle |
| 05/30/1989 | US4834410 Bicycle pairing apparatus |
| 04/12/1989 | CN2035729U Multi-function collapsible bicycle |
| 03/29/1989 | CN2034952U Foldable and detachable tricycle |
| 03/23/1989 | DE3729879A1 Adaptor part for assembling two normal bicycles to form a tandem or double bicycle |
| 03/21/1989 | CA1251486A1 Wheeled vehicle |
| 02/22/1989 | CN2032981U Multi-functional combined bicycle |
| 02/15/1989 | CN2032592U Foldable bicycle |
| 02/02/1989 | DE3724426A1 Longitudinally adjustable frame for bicycles and bicycle-related vehicles |
| 01/25/1989 | CN2031377U Multi-function foldable tricycle |
| 11/10/1988 | DE3714106A1 Coupling connection for combination vehicles comprising wheelchair and bicycle |
| 11/02/1988 | CN87212547U Folding connection device for bicycle |
| 10/12/1988 | CN87214542U Folding tricycle with sidecar |
| 09/28/1988 | CN87211744U Multi-functional folding bicycle |
| 09/28/1988 | CN87209509U Electric or manual double-purpose separating trolley |
| 09/14/1988 | CN87206286U Double purpose vehicle for riding or pulling |
| 09/13/1988 | US4770431 Snap on wheel chair bicycle converter |
| 09/07/1988 | CN87101651A Multifunctional facility unit |
| 08/03/1988 | CN87209401U Multipurpose bicycle |
| 07/21/1988 | DE3700388A1 Type of design for building and converting bicycles for more road safety, utility and convenience |
| 07/05/1988 | US4754832 Ski and mount for four wheel vehicle |
| 06/08/1988 | CN86108099A Travelling bicycle and travelling bicycle's coupler |
| 06/01/1988 | CN87212202U Bicycle transformable into tricycle |
| 04/20/1988 | CN87211141U 多功能自行车 Multifunction Bicycle |
| 04/12/1988 | CA1235164A1 Bicycle frame having a modifiable structure |
| 03/30/1988 | CN87209058U Demountable and foldable three-wheeled cart |
| 02/24/1988 | CN87204093U Multi-purpose child wheelbarrow |
| 02/03/1988 | CN87202615U Multipurpose portable vehicle |
| 01/27/1988 | CN87200854U Dismountable foldable two-bicycle united transportation device |
| 01/19/1988 | US4719983 Device and attendant equipment for converting a motor-scooter into a vehicle suitable for operating on snowy ground |
| 11/25/1987 | CN87202141U Combination bicycle |
| 11/18/1987 | CN86207602U Active trailer of bicycle |
| 11/04/1987 | CN87202644U Combined bicycle for domestic use |
| 10/21/1987 | CN87201105U Multi-functional trifoldable bicycle |
| 10/13/1987 | US4699229 Endless articulated steel band vehicle for off-road services |
| 10/07/1987 | CN86210397U Multi-functional special-shaped tricycle |
| 09/12/1987 | CN86201532U Travelling and loading double bicycle |
| 09/08/1987 | US4691930 Wheeled vehicle |
| 08/26/1987 | CN87100217A Multi-functional folding tricycle |
| 04/15/1987 | CN86201434U Amphibian bicycle for one or two person |
| 04/14/1987 | US4657270 Convertible tricycle |
| 03/31/1987 | US4653767 Simple bike |
| 03/25/1987 | CN86200420U Combined muitipurpose cart which is demountable |
| 03/24/1987 | CA1219621A1 Snow track belt for motorcycle |
| 03/03/1987 | US4647059 Bicycle which can be converted into a unicycle |
| 01/13/1987 | US4635740 Endless track attachment for a wheeled vehicle |
| 01/07/1987 | CN85201804U Support which is used for joining two bicycles in parallel |
| 09/23/1986 | US4613006 Ground-support vehicle |
| 09/10/1986 | EP0193574A1 Improvements in or relating to a wheeled vehicle |