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Karl Marx
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| Number | Title | Issue Date |
| 4480401 | Radio-controlled car In a radio-controlled car which is wirelessly controlled and capable of moving in a wheelie running state, the radio-controlled car comprises a braking member which is moved by a servomotor actuated in accordance with a direction turning command signal tr... | 11/06/1984 |
| 4471566 | Direction converting device for a running car racer A direction converting device for a toy car has an electromagnet energizable to a desired polarity upon change of a running direction and at least a pair of magnet elements arranged oppositely thereto and maintained at different polarities from each other... | 09/18/1984 |
| 4471567 | Two-way operating ball enclosed vehicle A vehicle within a ball self-maneuvers to escape obstacles with which confronted, without need for special sensors or programmed response; the vehicle has four wheels, two in front and two behind, but the wheels are of two different tread widths, wider tr... | 09/18/1984 |
| 4457101 | Radio-controlled toy car A radio-controlled toy car which can smoothly turn its running direction even when the toy car is running with the front wheels kept lifted from the ground, that is, even during the wheelie motion. The toy car according to the present invention comprises ... | 07/03/1984 |
| 4438588 | Remote control ball An improved system of the type having a ball or sphere and within it a remote-control powered vehicle, has provisions for determining vehicle orientation for more efficient control including one or more of: transparent ball portions, color ball portions a... | 03/27/1984 |
| 4424470 | Motor control circuit for radio controlled models The disclosed motor control device is responsive to control pulses received from a remote transmitter to provide switched duty cycle controlled power to the electric motor which drives the model, and provides neutral and fully proportional forward and rev... | 01/03/1984 |
| 4412535 | Remotely controlled massaging apparatus A self-propelled vehicular unit of a size sufficiently small to be transported across a body surface area to be massaged includes drive means for propelling the unit while imparting a massaging action to the area traversed and steering elements for steeri... | 11/01/1983 |
| 4406085 | Modular radio control for use with multiple toy vehicles A modular radio control unit for use with multiple toy vehicles is disclosed. The control unit is in the shape of a vehicle passenger compartment and is designed to plug into a cavity formed in each vehicle. The control unit contains a control circuit inc... | 09/27/1983 |
| 4387532 | Toy remote-control motor bicycle A toy remote-control motor bicycle comprising a servomotor for steering control of the front wheel provided on a chassis, a steering arm provided between the front wheel and the servomotor, which is characterized in that the rear end portion of the steeri... | 06/14/1983 |
| 4349986 | Radio-controlled toys A radio-controlled toy has a transmitter designed to transmit a signal amplified and modulated with a low-frequency square signal by the supply of power effected by closing a switch and a receiver having a receiving circuit portion and a forward-to-revers... | 09/21/1982 |
| 4342175 | Radio controlled motorcycle A two-wheeled motorcycle having a frame carrying a drive motor, a radio, a servo mechanism controlled by the radio, and a power source for driving the motor, radio, and servo. The servo mechanism includes a weight which may be moved to one side or the oth... | 08/03/1982 |
| 4290228 | Toy vehicles with automatic banking Several types of toy vehicles are provided which automatically lean when negotiating turns. One such vehicle is a radio-controlled toy motorcycle, which carries two outriggers with supports that extend downward from the typical positions of a rider's feet... | 09/22/1981 |
| 4275394 | Radio control driving circuit device A radio control driving circuit device used for a model device having a radio control system comprising a d-c power supply, two electric motors and a receiver, characterized in that two transistors of the same type, instead of the conventional complementa... | 06/23/1981 |
| 4272917 | Steering assembly rendering car unstable in a turn A steering assembly particularly adapted for incorporation into a remote controlled toy car is disclosed. The steering assembly includes a pair of kingpins which fixedly mount two steered wheels of the toy car. The kingpins are pivotably mounted on axles ... | 06/16/1981 |
| 4270307 | Remote controlled steerable amphibious toy A remote controlled self-propelled toy vehicle is disclosed which is capable of moving on a solid support surface and also on water. Two motors and a power source are mounted to the hull of the toy vehicle. Each motor drives, through a suitable transmissi... | 06/02/1981 |
| 4267663 | Radio-controlled steering device for toy motorcycles A frame of the motorcycle rotatably bears at its rear end, the rear wheel and has, at the front end, a pivot shaft extending along the central axis of the frame. Rotatably connected to the pivot shaft is a connecting block that supports a handle shaft axi... | 05/19/1981 |
| 4248011 | Self-operative steering for radio-controlled model car A self-operative steering for radio-controlled model car per se operative corresponding to radio-controlling signals transmitted from a controller of the model car. The steering comprises a housing containing a servomechanism therein, a pair of wheel-shaf... | 02/03/1981 |
| 4226292 | Miniature target vehicle A track-laying, remotely controlled, miniature target vehicle is shown, bearing an expendable shell which resembles a military tank. Four grooved pulleys on each side carry two V-belts as tracks, one wheel being electric motor-driven. The two reversible e... | 10/07/1980 |
| 4224762 | Radio controlled toy vehicle A toy vehicle having a set of motor-driven drive wheels for moving it forwardly and a motor-driven steerable wheel assembly for effecting changes in the direction of movement of the vehicle. The vehicle has a radio receiver coupled to the drive motor of t... | 09/30/1980 |
| 4213270 | Radio controlled wheel toy The direction of movement of a battery-powered wheel toy such as a toy car is controlled by a remotely located, hand-held transmitter. The car has a receiver and two motors mounted thereon, one motor being connected to drive at least one wheel of a first ... | 07/22/1980 |
| 4208834 | Remote radio controlled inflatable toys Remote radio controlled inflatable toy includes a huge inflatable figure of man, animal or object, a movable base connected to the bottom of the figure and operable by remote control of a radio signal, and a separately provided radio signal emitter/contro... | 06/24/1980 |
| 4197672 | Model racing car A model racing car having front wheels, rear wheels, drive motors and a radio control receiver and of the front drive type that is adapted to control a large steering angle of the front wheels by means of the output of the radio control receiver, wherein ... | 04/15/1980 |
| 4183174 | Toy stunt vehicle A self-propelled, four-wheeled vehicle is disclosed in which one of the rear wheels is motor driven, and the other rear wheel is arranged to be free-wheeling. Depending upon the selected drive torque transmitted to the single driven wheel, the vehicle eit... | 01/15/1980 |
| 4171592 | Toy moving car operated by a wireless electric device A toy moving car is a toy car operated by a wireless electric device and comprises a car and a wireless electric transmitter in separation. All means including a driving means and a braking means are mounted on a bottom plate of the car. A pair of front w... | 10/23/1979 |
| 4166338 | Steering system for radio or wire controlled traveling toys A steering system for radio or wire controlled traveling toys such as model cars having steerable wheels connected to a steering bar. Mechanism is in turn connected to the steering bar for actuation thereof and includes a pair of rack members connection t... | 09/04/1979 |
| 4163341 | Slotless steering assembly Miniature vehicles operable on a slotless track have their front wheels disposed on a tie bar assembly mounting a permanent magnet. The permanent magnet is disposed to be attracted to either the right or left pole piece of a solenoid. First and second ope... | 08/07/1979 |
| 4155554 | Miniature target tank A miniature vehicle usable by the military for target training. The vehicle ontains a radio receiver and propulsion-steering means responsive to radio output for causing the vehicle to execute evasive maneuvers. A technician equipped with a radio sending s... | 05/22/1979 |
| 4112615 | Remote control system for a movable toy vehicle A wireless trans-ceiver control system for a motor driven toy vehicle having a transmitter for generating a predetermined carrier of selected high frequency, and a receiving unit including a super regenerative detection circuit for receiving the high freq... | 09/12/1978 |
| 4034504 | Direction changing electromagnetic device for wheeled toys A direction changing device for moving toys to be operated by a wireless remote-control system, wherein an operating rod is laterally slidably disposed in parallel with a wheel shaft so as to be engaged with any one of a plurality of recessed portions for... | 07/12/1977 |