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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 4964598 | Apparatus and method for controlling aircraft, particularly remotely-controlled aircraft A remotely-controlled aircraft comprises a sensor for sensing the actual rate-of-turn of the aircraft and for generating a rate-of-turn signal proportional thereto, which signal, inherently also proportional to the actual bank-angle of the aircraft, is ap... | 10/23/1990 |
| 4929949 | Radio control transmitter having improved display characteristics A radio control transmitter, and more particularly, a digital radio control transmitter uses analog digital conversion within the transmitter and provides improved display characteristics of the trim settings involved with respect to the various control s... | 05/29/1990 |
| 4887781 | Transmitters A transmitter for use in an aircraft navigation system, the transmitter comprising a body portion (35) having an end (36, 37) adapted for implanting into the ground and an opposite end fitted with an antenna (38,39), and stabilizing means (41) arranged to... | 12/19/1989 |
| 4875646 | Aircraft navigation systems A navigation system for an aircraft fitted with an autopilot, the system comprising at least one ground-based transmitter (2), receiver means (7,8) mounted in the aircraft and including two antenna (5,6) oriented such that their polar diagrams overlap and... | 10/24/1989 |
| 4817948 | Reduced-scale racing system A reduced-scale racing apparatus having at least one self-powered, remotely controlled vehicle, and at least one operator's booth containing a control console for operating the vehicle, the vehicle having a wheeled body provided with a first control for c... | 04/04/1989 |
| 4765567 | Helicopter target A remote-controlled autogyro visually and functionally simulates a helicopter with stub wings (e.g. the Hind D), so that an expendable helicopter-simulating target is produced. The target has a fixed angle rotor shaft, the rotor being solely aerodynamical... | 08/23/1988 |
| 4748446 | Position coded pulse train Pulse position coding is used to transmit several channels of data from a ground radar transmitter to a receiver in an airborne, remotely-piloted vehicle. The system is designed to ignore interfering pulses, especially those which are synchronized with th... | 05/31/1988 |
| 4725956 | Voice command air vehicle control system A voice command air vehicle control system for use by an operator with a remotely piloted vehicle utilizes a voice recognizer for converting spoken commands into machine compatible control signals which are transmitted to the vehicle. Also disclosed is th... | 02/16/1988 |
| 4668950 | Encoding apparatus and method for a position coded pulse communication system Pulse position coding is used to transmit several channels of data from a ground radar transmitter to a receiver in an airborne, remotely-piloted vehicle. The system is designed to ignore interfering pulses, especially those which are synchronized with th... | 05/26/1987 |
| 4628312 | Decoding apparatus and method for a position coded pulse communication system Pulse position coding is used to transmit several channels of data from a ground radar transmitter to a receiver in an airborne, remotely-piloted vehicle. The system is designed to ignore interfering pulses, especially those which are synchronized with th... | 12/09/1986 |
| 4591114 | Automatic interlock connector arrangement for radio-controlled model airplanes A fail-safe, automatic interlock connector arrangement automatically electrically interconnects an electrical component on a wing to another electrical component on a fuselage of a radio-controlled model airplane at the same time that the wing is connecte... | 05/27/1986 |
| 4443014 | Combat simulator means A device adaptable to inexpensive models to operate either in a mode of being attacked or an attack mode that permits sequential shooting of energy within a predetermined angle profile and, within range limits, the receipt of such energy whereupon visual ... | 04/17/1984 |
| 4386914 | Transmitter extension apparatus for manipulating model vehicles An apparatus for controlling the control members of a transmitter used for sending radio signals to a receiver in a model airplane which emulates the actions of a pilot in a cockpit on board an aircraft.... | 06/07/1983 |
| 4335318 | Engine-driven model toy An engine-driven model toy having an engine, an electric motor connected to the engine and a power source battery, and characterized in that the electric motor, powered by the battery, drives the engine at the start of the engine while, during the continu... | 06/15/1982 |
| 4326685 | Sun-sensing guidance system for high-altitude aircraft A sun-sensing guidance system (10) for high-altitude aircraft (A) characterized by a disk-shaped body (14) mounted for rotation aboard the aicraft in exposed relation to solar radiation and having a plurality of mutually isolated chambers (28a, 28b, 32a, ... | 04/27/1982 |
| 4204656 | Airship control system The invention is a system for providing propulsion, control, and stability to small airships (miniblimps) in free flight, especially lighter than air airships. Propulsion is provided by a single motor. Control is achieved by moving the propulsion motor up... | 05/27/1980 |
| 4194708 | Remotely piloted vehicle A recoverable remotely piloted vehicle (RPV) having: a deflectable canard/elevator placed very close to the nose tip; a constant (cross) section fuselage; wings mounted low and well aft on the fuselage; elevons; a centrally positioned weapons/payload bay,... | 03/25/1980 |
| 4160253 | Radio controlled, battery-operated model toy A radio controlled, battery-operated model toy having an electric motor, a battery device for supplying energy to the electric motor, a radio control receiver, and a servo mechanism operated by the output of the receiver, wherein a voltage responsive auto... | 07/03/1979 |
| 4143307 | Motor speed control circuit apparatus A pulse width modulated DC motor speed control circuit for models including a demodulator for receiving an input pulse having a width which may vary from a reference width, and for generating a first positive output pulse having a width proportional to th... | 03/06/1979 |
| 3957230 | Remotely controlled electric airplane An airplane with an electric motor and rechargable battery pack are disclosed herein. The electric motor is of the high performance variety (i.e., it has a very high power rating for its size and weight). Means are provided for producing a high velocity b... | 05/18/1976 |
