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| Number | Title | Issue Date |
| 7283011 | Method for performing dual phase pulse modulation A modulation method, referred to as dual phase pulse modulation (DPPM), represents digital data as a series of high and low pulses whose widths represent groups of M data bits, with both the high and low pulses representing successive M-bit groups. Each of the 2 | 10/16/2007 |
| 7221295 | High speed serializer-deserializer A high speed serializer-deserializer (SerDes) that passes significantly more data through a channel for a given analog bandwidth and signal-to-noise ratio. This SerDes technique involves converting a plurality of bits to be transferred to positions of edges of a wav... | 05/22/2007 |
| 7049954 | Data transmission system A data transmission system for short but frequent data pulses comprises a transmitter (10) and a receiver (12). The transmitter comprises a pseudo-random signal generator (16) which governs the time delay between successive timing points and a l... | 05/23/2006 |
| 7049752 | Light emitting diode control device A control device of LEDs includes a lighting-up circuit and a lighting-out circuit, both of which generate pulse signals being pulse-width modulated by varying cycles and corresponding duty ratios based on an input signal during a start-up period and a falling perio... | 05/23/2006 |
| 6975206 | Method for communication between central terminal and multiple transponders A method of communicating information from first and second transponders (or multiple transponders) to a central monitoring device, and a communications apparatus, are disclosed. The method includes receiving a starting indication at the transponders, determining st... | 12/13/2005 |
| 6943696 | Protocol for avoiding interference between transmission devices Systems and methods for preventing signal jamming within a consumer electronics system comprising a remote control, interpreting device, and audio/video device. A plurality of primary messages are generated by, and wirelessly transmitted from, the remote control in ... | 09/13/2005 |
| 6816070 | Method of generating an alert for walkie-talkie when out of communicatable distance A method of generating a warning signal for a walkie-talkie includes: providing a detector and a timer; using the timer to count time; using the detector to determine whether the strength of a radio frequency (RF) signal which includes a standard CTCSS tone received... | 11/09/2004 |
| 6714137 | Protocol for avoiding interference between transmission device Systems and methods for preventing signal jamming within a consumer electronics system comprising a remote control, interpreting device, and audio/video device. A plurality of primary messages are generated by, and wirelessly transmitted from, the remote control in ... | 03/30/2004 |
| 6556124 | Knocking activated device and method for operating an electromechanical device responsive to a control signal A knocking activated device and method for operating an electromechanical device responsive to a control signal. The knocking activated device has a vibration transducer for generating a signal in response to knockings on a solid object. It also has a sto... | 04/29/2003 |
| 6263069 | Impact activated telephone method and apparatus A method and apparatus for activating an emergency telephone mounted upon a structure, wherein the telephone is activated as a result of an impact by an object upon the structure causing the telephone to go off-hook active with immediate automatic connect... | 07/17/2001 |
| 6225916 | Remote control signal reception controller The remote control signal reception controller receives control data transmitted from a remote control signal sender. The remote control signal reception controller informs a CPU that controls a device of the information on the received control data by in... | 05/01/2001 |
| 6198392 | Communications system and method with A/D converter A communications system including a radio frequency identification device including an integrated circuit having a single die including a microprocessor, a receiver coupled to the microprocessor, and a backscatter transmitter coupled to the microprocessor... | 03/06/2001 |
| 6147719 | Pulse position modulation protocol Methods and apparatus for use in communication between a remote control and a receiving unit provide power saving modes of operation and enable remote control use of high data generating devices, such as a trackball. A pulse position modulation protocol i... | 11/14/2000 |
| 6108377 | Transmitter unit for an anti-theft system of a motor vehicle, and method for operating the transmitter unit A transmitter unit generates a carrier signal in the form of a periodic bipolar signal. The carrier signal has intrapulse periods between two pulses of different polarity. A transmission antenna is operated with the bipolar signal. To prevent the harmonic... | 08/22/2000 |
| 5936540 | Process for the management of concurrent access and device for practicing the same Process for managing concurrent access permitting the successive input or storage of several slave devices (receiver/transmitter) in the field of action of a master device (emitter/reader) so as to render possible the exchange of data in two directions wh... | 08/10/1999 |
| 5796178 | Anti-theft apparatus for a vehicle An anti-theft device memorizes the location of the vehicle when the engine stops, receives a signal peculiar to a vehicle (for example, from a key having a transmitter), and permits starting the engine when the received signal is identical with a predeter... | 08/18/1998 |
| 5723912 | Remote keyless entry system having a helical antenna A vehicle controller is presented for use in a remote keyless entry system for controlling a vehicle device function. The controller includes a receiver for receiving a RF request signal including a security code uniquely identifying a portable transmitte... | 03/03/1998 |
| 5692127 | System for transmitting multiple pulses PPM control signal to wireless device to indicate collision in a wired network while placing data on the network A method and apparatus for detecting and indicating a collision on a wireless channel are provided. According to the method, data is transmitted over the wireless channel using pulse position modulation. The channel is monitored during each pulse position... | 11/25/1997 |
| 5654698 | Missile telemetry data interface circuit An interface circuit which receives a PCM telemetry data stream comprising waveform divided into 100 words including a three word frame sync signal. The PCM data stream is supplied to a comparator which converts input telemetry signal to a TTL compatible ... | 08/05/1997 |
| 5525976 | Temperature measuring system For temperature measurement at a number of measuring points on, for example, current-carrying bars (2) in a high-voltage switchgear, a data transmitter (1) is used which is arranged near each measuring point and at the same potential as such point. The tr... | 06/11/1996 |
| 5483231 | Remote-control signal receiver for limiting receipt of data during a blanking period A remote-control signal receiver includes an input apparatus to input remote-control signals consisting of data trains repeated at a predetermined frequency, a data incorporating apparatus by which the remote control data derived from the remote-control s... | 01/09/1996 |
| 5387906 | Signal receiving control system of a remote control device A control system includes receiving module for receiving a signal from a transmitting unit. Also included is a microprocessor including an input port for inputting the signal from the receiving module so as to decode the input signal and control the loads... | 02/07/1995 |
| 5349459 | Secure remote control system A vehicle access transmitter and receiver pair which cooperate to implement a code transmission strategy which requires a minimum amount of energy thereby accomplishing maximum battery life while achieving operations secure from unauthorized access. The t... | 09/20/1994 |
| 5323203 | Wireless remote control apparatus for camera A wireless camera remote control apparatus comprises a transmitter unit for transmitting an activating pulse and a plurality of code pulse signals corresponding to given operations of the camera; and a receiver unit responsive to a code defined by the plu... | 06/21/1994 |
| 5271584 | Pulse code railway signalling system A railway signalling system uses coded electrical information signals to convey vital signal information to wayside signal locations. The coded information signals are in the form of unipolar three-pulse DC signals capable of being sent or received during... | 12/21/1993 |
| 5227779 | Codable electronic devices Pulses of a carrier signal supplied to an input circuit of a codable electronic device, e.g. a transponder tag, are divided by a chain to provide a logic signal, the value of which depends on the length of the pulse, the logic signal only being entered in... | 07/13/1993 |
| 5200676 | Multiplexed vehicle window wiper control A window wiper system for an automotive vehicle provides multiplex encoding of a control switch signal and an additional wiper control signal in a two-channel multiplex control signal and decoding of the multiplex control signal by the wiper mechanism for... | 04/06/1993 |
| 5175868 | Portable transmitter/receiver apparatus with coded data transmission for reduced interference A transmitter/receiver apparatus includes a transmitter and a receiver. The transmitter includes an intermittent signal generator and an intermittent modulator. The intermittent signal generator generates an intermittent signal. The intermittent modulator... | 12/29/1992 |
| 5159332 | Proximity identification system with flux concentration in operating region A proximity identification system incorporating ferrite rods. The rods are used in both the reader and the tag and additional rods may be used to strengthen and concentrate the flux field in the regions near the reader to obtain better performance in such... | 10/27/1992 |
| 5134347 | Low power consumption wireless data transmission and control system A low power consumption wireless data transmission and control system 10 is disclosed and in one embodiment, is used to automatically articulate a shade 24 by use of a transmitted command signal 14. The system 10 contains a receiver/detector 18 which is s... | 07/28/1992 |
| 5128653 | Fire alarm system A fire alarm system in which an analog type sensor (3) is connected to a transmission line (2) from a receiver (1) and in which one or more on-off type sensor (7) located in the same monitor area (14, 15, 16) as that in which the analog type sensor (3) is... | 07/07/1992 |
| 5081402 | Low power consumption wireless data transmission and control system A low power consumption wireless data transmission and control system 10 is disclosed and in one embodiment, is used to automatically articulate a shade 24 by use of a transmitted command signal 14. The system 10 contains a receiver/detector 18 which is s... | 01/14/1992 |
| 4931790 | Digital remote control method A digital remote control method in which interference among different devices is eliminated by the use of a custom code and an instruction code. In accordance with the invention, a transmission code is generated composed of an instruction code and a custo... | 06/05/1990 |
| 4928318 | Optical signal transmission system including pulsed FM modulator/demodulator In the pulsed FM system, the input signal is first modulated into the pulse FM signal. Thereafter, this pulse FM signal is modulated into the pulsed FM signal by the frequency divider. This pulsed FM system is suitable to CATV.... | 05/22/1990 |
| 4870425 | Communications system A communication system particularly adapted for use in an aircraft collision avoidance system wherein the transmitted portions of messages changed between aircraft consist of pulses or pairs of pulses at the beginning and end of a message. The data or inf... | 09/26/1989 |
| 4845773 | Method and a system for remotely switching an electrically operated device by the use of signals generated by a telephone A switching system and a method of remote switching an electrically operated device by using calling signals generated by a telephone. A switching element is actuated by the system upon detecting a specific code of the calling signals generated by the tel... | 07/04/1989 |
| 4835531 | Automobile remote-control system An automobile remote-control system is disclosed. This system is characterized such that: a transmitter includes a carrier oscillating circuit for oscillating a carrier with a frequency higher than a radio broadcasting frequency band or a telephone transm... | 05/30/1989 |
| 4833467 | Data transmission system In a digital data transmission system, a transmitting device converts the data to be transmitted into a series of bits, in the form of data pulses. Each data pulse is positioned between successive synchronous pulses having a fixed time period, and each bi... | 05/23/1989 |
| 4794371 | Remote control apparatus A remote control apparatus in which a plurality of loads, assigned to a plurality of load stations, can be individually addressed via a single signal line without the use of complex multiplexing and demultiplexing circuitry. A pulse generator outputs burs... | 12/27/1988 |
| 4779265 | Multiple access communication system Methodology, and associated circuitry, for encoding and decoding signals utilize bistate orthogonal code techniques that effect autonomy of communications and simplified signal processing, thereby improving reliability. Encoder (121) processes an incoming... | 10/18/1988 |
