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A vest or belt is integrally formed with tubular, pet receiving passageways which extend around the wearer's body and terminate in pocket-like chambers for feeding and retrieval.
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| Number | Title | Issue Date |
| 4358763 | Continuous-wave radar responder having two-position switches The invention relates to C-W radar responders, having a carrier of some gigahertz whose amplitude is modulated between some dozens and some hundreds of kilohertz. Such a responder comprises means for sampling the signal it receives in such a manner that t... | 11/09/1982 |
| 4350982 | Frequency-agile transponder A compact transponder for use with frequency-agile pulsed radars incorporng an Amplified Ferromagnetic Echo Device (AFED) which repeats, backwards, after a short and controllable delay, a microwave pulse fed into it.... | 09/21/1982 |
| 4347512 | Communications systems utilizing a retrodirective antenna having controllable reflectivity characteristics A communications system is described which utilizes an antenna having means for selectively controlling the amount of incident electromagnetic energy directionally reflected therefrom. The antenna is comprised of a spherically configured array of conducto... | 08/31/1982 |
| 4345253 | Passive sensing and encoding transponder A passive transponder for identifying objects remote to an interrogator includes an oscillator which generates a first frequency signal, a counter which divides the first frequency into a series of lower frequency signals, at least one multiplexer having ... | 08/17/1982 |
| 4331957 | Transponder for use in locating avalanche victims A transponder adapted to be carried on the body of a person for use in locating avalanche victims is designed for cooperation with a search-transmitter and includes a receiver having a passive non-linear element which, by distortion, produces a higher har... | 05/25/1982 |
| 4314373 | Passive transmitter including parametric device A passive transmitter incorporates a parametric device, e.g. a varactor diode. A tuned circuit derives energy received from a source of radiowaves, and is coupled to pump the varactor diode. The varactor diode produces a subharmonic output. Means are coup... | 02/02/1982 |
| 4292636 | Passive reply device for use in the automatic wireless transmission of multi-place numerical information between active interrogation devices and such passive reply devices, which are movable with respect to one another and method of making the same The invention relates to a passive reply device for use, for example, in automatic wireless transmission of multi-place numerical information between it and an active interrogation device which are movable with respect to one another, particularly for tra... | 09/29/1981 |
| 4263595 | Apparatus for identifying objects and persons A system for identifying persons and objects includes an information carrier adapted to be secured to an object to be identified, and a read unit coupled to the information carrier by means of electromagnetic waves. The information carrier incorporates a ... | 04/21/1981 |
| 4218680 | Coded coherent transponder A transponder including a receiver and transmitter for receiving an interrogation signal and transmitting a coherent response with circuitry for modulating the coherent response to include a predetermined coded complex phase and/or amplitude shift therein... | 08/19/1980 |
| 4213129 | Delay stabilizing system A system for stabilizing the amplitude and, thus, the delay of a signal pulse subsequent to the first interrogating signal pulse to a transponder used in a range measurement system. AGC level in the transponder is set responsive to the first interrogating... | 07/15/1980 |
| 4185284 | Ground station for the DME distance measuring system A novel DME transponder having a plurality of directional antennas arranged equidistantly on a circle each having a radial, highly directional pattern and as a group covering 360° in the azimuth plane. The antennas are divided into at least two groups of... | 01/22/1980 |
| 4180815 | Radio identification systems To enable a transponder in a radio identification system, such as a secondary surveillance radar system, to remain responsive to a new interrogating signal received while it is processing a previously received interrogating signal, the transponder is prov... | 12/25/1979 |
| 4169264 | Synchronous digital delay line pulse spacing decoder An air traffic control transponder includes a synchronous digital delay line decoder for providing mode selection signals in response to pulse space coded transmissions from the ground station. The decoder comprises a shift register delay line having a pl... | 09/25/1979 |
| 4135187 | Transponder decoder/encoder circuitry A single crystal controlled oscillator provides clock pulses that are used to drive both the decoder shift register and the encoder shift register of an ATC transponder. An input pulse of the interrogation signal from a ground station is shifted down in t... | 01/16/1979 |
| 4129869 | Automatical signalling apparatus An apparatus for receiving a repetitive radar pulse wave signal, generating an ON-OFF signal upon reception of the radar pulse wave signal, and applying the ON-OFF signal to a speaker or a display lamp to indicate the reception of the radar pulse wave.... | 12/12/1978 |
| 4129868 | Radar beacon apparatus A radar beacon apparatus to be used in conjunction with a search radar during emergency rescue operations. The radar beacon apparatus includes a receiving unit for receiving and detecting a radar pulse wave; a gate signal generating unit for generating up... | 12/12/1978 |
| 4129867 | Multi-pulse modulator for radar transponder A radar transponder receiving regularly recurring pulses and providing selectively different delays for such pulses through the use of a single variable delay path, whereby the pulses, upon being received by the originating radar, appear as closely spaced... | 12/12/1978 |
| 4123754 | Electronic detection and identification system An electronic detection and identification system for use in the rapid identification of vehicles at a toll stop, and like uses, is provided which employs an electronic identification card that is carried by the vehicle to be identified and a fixed transm... | 10/31/1978 |
| 4096477 | Identification system using coded passive transponders An identification system including a transmitter, a receiver, a decoding subsystem, and a passive transponder identifier. One passive transponder identifier of the invention is a surface acoustic wave device provided with pad means for applying and removi... | 06/20/1978 |
| 4075631 | System for identifying objects equipped with an automatic transponder There is described a system for interrogating objects equipped with an automatic transponder in which a fixed station transmits an interrogation signal formed by at least two characteristic pulses and the transponder returns a coded response consisting of... | 02/21/1978 |
| 4075632 | Interrogation, and detection system The specification relates to a telemetering apparatus comprising a generator which generates at least a single frequency rf signal, a transponder for receiving that signal and for amplitude modulating it in accordance with information selected for transmi... | 02/21/1978 |
| 4070672 | Answering device for a system for the automatic wireless transmission of multi-position data between interrogation devices and answering devices movable with respect to one another An answering device in a system for automatic wireless transmission of an item of information coded by a plurality of frequencies is disclosed herein. An interrogation device movable with respect to the answering device transmits an interrogation signal h... | 01/24/1978 |
| 4068232 | Passive encoding microwave transponder A passive transponder which provides remote identification of objects including cargo and trailers, vehicles or a variety of objects which move through an interrogator beam. The passive transponder is mounted onto the vehicle or object or at the location ... | 01/10/1978 |
| 4067011 | Digital transponder universal pulse assembly A combination of large scale integrated digital circuits for providing universally selectable decoding, encoding and over-interrogation control functions in a radar transponder. The circuits are implemented in semiconductor chip and hybrid circuit form an... | 01/03/1978 |
| 4063173 | Dual mode receiver A transponder including a receiver and a transmitter controlled by the output of the receiver, with the receiver including a first phase locked loop with a mixer and a voltage controlled oscillator supplying an output to a second phase locked loop includi... | 12/13/1977 |
| 4059831 | Passive transponders using acoustic surface wave devices A passive transponder sensitive to electromagnetic pulses received in the form of surface acoustic waves. The device utilizes a plurality of interdigital transponders each consisting of a metallic deposit on a piezoelectric substrate and serving as an ele... | 11/22/1977 |
| 4047171 | Transponder A radar transponder which transmits a frequency coherent coded reply for each interrogation pulse it receives within a broad frequency. The transponder comprises means for receiving an incoming signal pulse; means for converting the incoming pulse into a ... | 09/06/1977 |
| 4040053 | Transponder system for the transfer of signalling information for rail-bounded vehicles A transponder system with ensured synchronization for a railway signalling system, comprising an interrogating station, from which an interrogation signal is transmitted continuously, and a responder station which is energized in response to the interroga... | 08/02/1977 |
| 4023167 | Radio frequency detection system and method for passive resonance circuits A system for detecting passive resonant circuits in which bursts of swept radio frequency are transmitted to excite passive resonant circuits. If a circuit is resonant at a particular burst frequency, it is excited, rings and emits a radio frequency signa... | 05/10/1977 |
| 4015259 | Method and apparatus for interrogating and identifying fixed or moving targets Hijacked vehicles, or the like, are identified by illuminating a transpon mounted to the vehicle by a beam of microwave energy, e.g., from a helicopter flying over the traffic. The transponder includes non-linear diodes which reradiate a signal back towa... | 03/29/1977 |
| 4006477 | Pulse coherent transponder with precision frequency offset A radar reply transponder for use with existing radar tracking systems wherein a reply pulse is generated and trasmitted in response to an associated interrogation pulse. The reply pulse is delayed in time and offset in frequency by a precise amount with ... | 02/01/1977 |
| 4001822 | Electronic license plate for motor vehicles An electronic license tag or plate formed into a unitary structure and including a single antenna system cooperating in a system comprising a harmonic radiator which transmits a pulse coded identification signal in response to an interrogation signal, and... | 01/04/1977 |
| 3996587 | Semipassive responder utilizing a low voltage, low power drain reflective varactor phase modulator A semipassive responder for use in a communication system wherein an interrogating unit transmits an interrogation signal to illuminate the responder. The responder generates, in response to incident interrogation signals, a phase-coded reply signal, util... | 12/07/1976 |
| 3981011 | Object identification system using an RF roll-call technique An object identification system using an RF roll-call technique wherein an interrogator illuminates a multitude of cooperating objects with a sequence of codes and receives from each such cooperating object an acknowledge signal immediately following the ... | 09/14/1976 |
| 3946393 | Transponder for use in a radio frequency communication system A transponder for use in a radio frequency communication system is disclosed wherein a received radio frequency signal is converted into an intermediate frequency signal, the latter signal being distorted by a nonlinear network to produce a composite sign... | 03/23/1976 |
| 3940765 | Arrangement for a passive responder for a position finding system This invention relates in general to a passive responder of a position finding system including at least one microwave antenna and a resonator body. The resonator body is mounted adjacent the rail of a railroad track and is connected to a microwave antenn... | 02/24/1976 |
