Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 7170421 | Control apparatus, controlled apparatus, and remote control system and remote control method using these apparatuses In one aspect of this invention, a control unit generates a frame having control data, and transmits it to a controlled apparatus via a transmission/reception unit or the like at a predetermined priority. In the controlled apparatus, a transmission/reception unit re... | 01/30/2007 |
| 7132956 | Electronic apparatus and remote controller A wireless AV station is furnished with an Internet browsing function, a TV viewing function, a TV recording and playback function and a message board function, and these multiple functions are activated by a command from a plurality of personal computers each opera... | 11/07/2006 |
| 7129816 | Remote control system Provided is a remote control system capable of preventing a key code from being deciphered when the key code is transmitted from a transmitter to a receiver to be registered. In the transmitter, in response to a specified switch operation, a k-th common key code in ... | 10/31/2006 |
| 6962293 | Circuit for generating clock signal and decoding data signal for use in contactless integrated circuit card Disclosed is an integrated circuit card which includes a circuit for generating a clock signal and for restoring data. The circuit includes a receiver for receiving a radio frequency signal having a pause period; a divider for dividing the received signal; a first c... | 11/08/2005 |
| 6930995 | Apparatus and method for synchronization in a multiple-carrier communication system by observing a plurality of synchronization indicators A method, apparatus and system detects a loss of synchronization between a transmitter and a receiver in a multiple-carrier communication system such as an OFDM system. A plurality of synchronization indicators are observed to determine whether a loss of synchroniza... | 08/16/2005 |
| 6567012 | Remote control device A transmission code 15 consisting of a transmitter ID code 16 and a operation switch control code 17 is transmitted through actuation of operation switches A and B of a transmitter 1. In a program mode of a receiver 4, a function selection code correspond... | 05/20/2003 |
| 5933074 | Remote control transmitter broadcasting RF signals conveying plural information components A unique transmitter broadcasting a single RF (radio frequency) signal in response to a single input for controlling a plurality of electrical vehicle accessories. To control the plurality of accessories, the RF signal conveys multiple information compone... | 08/03/1999 |
| 5781582 | Frequency agile transceiver with multiple frequency synthesizers per transceiver A base station communicates with a plurality of mobile stations over a cellular network. In one embodiment, the base station includes a receiver having a receiver synthesizer input, where the receiver is configured to receive inbound information from the ... | 07/14/1998 |
| 5640335 | Collision operators in physical process simulation A computer implemented method for simulating a physical process. The method includes storing in a memory a state vector for each of a number of voxels. Each state vector includes a plurality of integers, each of which corresponds to a particular momentum ... | 06/17/1997 |
| 5319797 | Remote vehicle access featuring high security A remote signal transmitter capable of producing a radio frequency signal for implementation of access commands including an oscillator circuit which is alternatively capable of producing a fixed frequency signal or a modulated frequency signal as a resul... | 06/07/1994 |
| 4868872 | Telephone tone detector A tone detector comprising a circuit for detecting multi-frequency dialing (DTMF) signals applied to an input terminal and for generating a "DTMF present" indicating signal, and a circuit for detecting the presence of supervisory signals applied to the in... | 09/19/1989 |
| 4849989 | Data modem receiver In a data modem receiver (80) the received signal is digitized in an A/D-converter (84), the output of which is applied to notch filter means (88, 96) which eliminates secondary channel signals, and which applies an output signal to a pair of IIR filters ... | 07/18/1989 |
| 4818989 | Selective calling decoder There is disclosed an aircraft selective calling decoder for decoding individual signal tones used in selectively signaling communication of a particular aircraft. The decoder is associated with a channel of receiving equipment in an aircraft and is respo... | 04/04/1989 |
| 4742534 | Telephone receiving equipment for recognizing predetermined combinations of voice-frequency signalling components A telephone signalling receiver comprising speech detectors for respective voice-frequency signalling components of push-button (TDK) signals which are in a frequency band divided into lower and upper frequency subgroups. Each detector calculates the Disc... | 05/03/1988 |
| 4738260 | Unintentional urination sensing device An apparatus for detecting unintentional urination by a user includes an elongated belt of a liquid impermeable flexible material to which a urine sensing pad is detachably mounted. An electrical circuit carried by the belt, which may include a transmitte... | 04/19/1988 |
| 4614274 | Control system for automatic material handling crane An automatic material handling crane system services a plurality of stations in an industrial plant. The system includes a crane which is movable on a track, a mast which is carried by the crane, and a material handling mechanism which is carried by the m... | 09/30/1986 |
| 4602357 | Coded acoustic alarm transmitter/receiver system The coded acoustic alarm transmitter/receiver system includes a transmitter for selectively providing both an audible alarm in the audio frequency range and a silent alarm in the ultrasonic frequency range. These alarm signals may be provided by a plurali... | 07/22/1986 |
| 4602131 | Touch tone decoder A programmable tone decoder for standard bell system DTMF tone pairs is presented which comprises an integrated DTMF receiver and a means for programming a sequence of digits which are compared to the output of the DTMF receiver. The decoding means provid... | 07/22/1986 |
| 4555791 | Method and apparatus for determination of the state of an all-or-none modulated alternating signal in a perturbed environment The state of an all-or-none modulated useful signal subjected to a perturbed environment is determined, on reception, through the use of non-modulated reference signals subjected to the same environment. The reference signals have respective frequencies n... | 11/26/1985 |
| 4533914 | Remotely controlled crossconnection system A DTMF encoder at a central office is connected to a spare pair of a feeder cable for remotely controlling with a 5-digit number a series of relay coil matrices where the coils perform latch and release functions for 50 latching relays in each matrix. Two... | 08/06/1985 |
| 4479229 | Arrangement for and method of detecting multi-frequency sound code signals A multi-frequency signal receiver for use in telephony signalling systems comprises a plurality of frequency selective circuits whose outputs are connected to a signal combination detector which produces a code at its output which depends on the signals p... | 10/23/1984 |
| 4473821 | Personal acoustic alarm system The personal acoustic alarm unit produces an audible alarm signal in the audio range to alert persons in the area of the signal transmitter. This audio alarm signal is formed by a plurality of simultaneously generated audio frequency sonic signals, each o... | 09/25/1984 |
| 4471170 | Non-integer programmable counter An I2 L non-integer programmable counter is provided that has a high frequency precision that uses feedback to adjust count length. A first divider adapted to receive a clock signal having a first frequency and an input signal, provide a signal... | 09/11/1984 |
| 4443783 | Traffic light control for emergency vehicles A system for controlling traffic lights to clear intersections in advance of the approach of an emergency vehicle, in which a directional radio transmitter and antenna are provided on the vehicle, which transmits one or the other of two selected coded sig... | 04/17/1984 |
| 4347408 | Multi-frequency signal receiver A multi-frequency signal receiver, in which the digital input signals having the sampling frequency of 8 KHz or a multiple thereof are resampled at a sampling frequency of 4 KHz by means of a resampling circuit and in which the signals thus resampled are ... | 08/31/1982 |
| 4272766 | Radio operated remote control A radio operated remote control unit for attachment to a transmitter and having a second module attached to a transreceiver, which, through the use of a dual tone multi frequency signal, turns on the lights, or similar work, and maintains that status for ... | 06/09/1981 |
| 4206323 | Dual tone multifrequency signal receiver A system and method for detecting the presence of a tone burst and identifying the frequency signals contained within the tone burst of a dual tone multifrequency system includes an arrangement for applying the tone burst to a plurality of filter circuits... | 06/03/1980 |
| 4199761 | Multichannel radio communication system for automated power line distribution networks An automated electric power distribution network includes a radio communication system for transmitting multipurpose, multitone signals in one or more signaling channels over the auxiliary channel or channels of one or more commercial broadcast stations. ... | 04/22/1980 |
| 4085295 | Multi-frequency signal receivers A multi-frequency signal receiver comprising an automatic gain control circuit for adjusting the level of the multi-frequency signal, a plurality of bandpass filters for separating the output from the automatic gain control circuit into respective frequen... | 04/18/1978 |
| 4082924 | Reference signal circuit in a receiver for detecting two frequencies in a multifrequency tone signal A reference signal circuit in a multi-frequency signal receiver for detecting the two signalling frequencies in an incoming voice frequency signal. The circuit has two paths for receiving the incoming signal. One path includes a rectifier and attenuation ... | 04/04/1978 |
| 4057805 | Radio-controlled machine power cut-off A pair of battery-powered radio transmitters are individually worn on the wrists of a machine operator, and two radio receivers are tuned to receive the signals broadcast by the radio transmitters, the first radio receiver being a proximity-sensitive devi... | 11/08/1977 |
| 4042790 | Voice guard circuit for a tone receiver Analog detection of invalid signal conditions at the input to a Dual Tone Multiple Frequency (DTMF) tone receiver is provided. The average of the voltage peak amplitudes of the signals in the upper and lower bands of the DTMF signal are crossed compared, ... | 08/16/1977 |
| 4042789 | Tone combination detector and coincidence timer circuit A tone receiver for detecting a Dual Tone Multi-Frequency (DTMF) signal includes first and second digital tone detectors for the high and low bands, respectively. These detectors are of the type which employ the period detection technique. Each detector h... | 08/16/1977 |
| 4041248 | Tone detection synchronizer A synchronizer circuit for use with tone receivers employed in the reception of asynchronous tones. A plurality of latch stages controlled by an external clock pulse source and internal timing circuitry provides synchronized outputs of a series of signals... | 08/09/1977 |
| 4039959 | Two-tone decoder having high noise immunity A decoder for converting a frequency coded digital input signal into a binary output signal. The decoder includes circuitry which detects when the input signal consists of the proper tones. When these tones are present, the decoder circuitry converts the ... | 08/02/1977 |
| 3936801 | Multifrequency signal receiver timing circuit A digital timing circuit comprising integrated circuits is presented for multifrequency signal receivers in which a first counter is pulsed by a clock to generate predetermined timing intervals under the control of a second counter. The second counter seq... | 02/03/1976 |
