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| Number | Title | Issue Date |
| 7332688 | Active material based lockout mechanisms Control mechanisms and methods of use include the use of active materials as a blocking element. The control mechanisms generally include a tactile control in operative communication with an electrical circuit, wherein actuation of the tactile control closes the ele... | 02/19/2008 |
| 7283623 | Internet browsing using a uniform interface A system and method for providing a uniform interface on heterogeneous access devices, that are capable of requesting specified classes of information from a server. Access devices, such as those that access Internet content, are often of different hardware and soft... | 10/16/2007 |
| 6980611 | System and method for measuring RF radiated emissions in the presence of strong ambient signals A system for suppressing ambient signals from a signal containing radiated emissions of a electronic device and ambient signals. The system comprises a first receiver operative to receive the ambient signals and the radiated emissions from the electronic device. The... | 12/27/2005 |
| 6256488 | Dialing method in wireless local loop terminal A method for processing a dialed signal in a WLL terminal. Upon sensing of an off-hook state of a telephone connected by wires to a WLL terminal, a DTMF signal corresponding to a key input from the telephone is generated and it is converted into a digital... | 07/03/2001 |
| 5859913 | Method and system for the high-speed generation and transmission of a sequence of characters by means of voice frequencies Disclosed is a method enabling the generation, by means of voice frequencies, of a sequence of several characters and the high-speed transmission of these characters. This method comprises the step of the elimination, during transmission, of the blanks be... | 01/12/1999 |
| 5793863 | Telephone having a speech band limiting function In a telephone, a speech band switching circuit selectively provides a received speech with one of a plurality of frequency characteristics. A sensing circuit senses the level of noise around the telephone. A speech band control circuit compares the noise... | 08/11/1998 |
| 5438618 | Vocal frequency suppression apparatus and method A vocal frequency suppression apparatus for suppressing selected portions of a vocal signal to prevent inadvertent control of components controlled by dual tone multi-frequency ("DTMF") codes. The vocal frequency suppression apparatus includes a DTMF code... | 08/01/1995 |
| 5128982 | Electronic apparatus for "Hands off" control of a voice mail system An apparatus for "hands off" control of a Voice Mail System over a telephone line by a user to allow the user to simultaneously perform other functions such as manually processing the "oral mail" to take notes, do data entry or the like. The apparatus inc... | 07/07/1992 |
| 5105438 | Remotely accessing intelligent network channel terminating equipment device This invention is a method of remotely accessing an Intelligent Network Channel Terminating Equipment device to expedite the testing and servicing of telecommunications circuits. Intelligent Network Channel Terminating Equipment devices from different man... | 04/14/1992 |
| 5048074 | Electronic apparatus for "hands off" control of a voice mail system An apparatus for "hands off" control of a Voice Mail System over a telephone line by a user to allow the user to simultaneously perform other functions such as manually processing the "oral mail" to take notes, do data entry or the like. The apparatus inc... | 09/10/1991 |
| 5042066 | Dialer circuit A dialer circuit equipped with built-in dialer memories for auto-redial or abbreviated-dial telephone communication and operable to send out a DTMF signal or a pulse signal to a telephone circuit based on a key input signal. A battery voltage is supplied ... | 08/20/1991 |
| 4868858 | Keypad/dialler interface for telephone test set The functionality of the keypad of a telephone test set is augmented by an interface circuit arrangement which enables keys of the keypad to be used to control both dialing signal generation and prescribed test functions, while effectively preventing inte... | 09/19/1989 |
| 4490579 | Auto-dialing pager receiver A telephone dialing pager providing a visual display of a caller's telephone number and storage of a plurality of telephone numbers of consecutive callers. The stored information data corresponding to each caller's telephone number is recalled for display... | 12/25/1984 |
| 4475012 | Subscriber telephone set incorporating overvoltage protection Electronically controlled subscriber telephone set which down-stream is protected by two PTC resistors and a VDR which are thermally coupled, is protected upstream of the hook contacts by a power limiting circuit which also acts as a line current interrup... | 10/02/1984 |
| 4348550 | Spoken word controlled automatic dialer A speech controlled dialing circuit identifies input utterances which may be a command word (mode select), repertory word (dialing name or number), or non-recognized ("Other"). Responsive to the identification of each occurring input utterance, a set of p... | 09/07/1982 |
| 4320257 | Compensation of transmission losses in a telephone system In a telephone system, compensation for transmission losses over any given section of the transmission path is achieved by inserting at a selected location in the telephone transmission path a variable gain amplifying means, sensing the amplitude of a mul... | 03/16/1982 |
| 4309573 | Loudspeaking substation circuit An improved loudspeaking substation circuit employing a dual-tone multi-frequency signal generator wherein output tone levels are regulated by the substation transmission circuit when operating in either a loudspeaker or handset mode. The circuit further ... | 01/05/1982 |
| 4223186 | Circuit arrangement for line-supplied subscriber stations having dial devices A circuit arrangement for subscriber stations which are supplied by way of subscriber lines and which have dial devices and voice circuits employ, in order to minimize the insertion lost during the voice mode, current feed to the dial device by way of a d... | 09/16/1980 |
| 4211895 | Electronic telephone system with time division multiplexed signalling An electronic telephone system has a plurality of extensions connected radially to a central equipment by respective cables each providing separate speech and signalling paths. Each of the signalling paths is provided by a balanced conductor pair terminat... | 07/08/1980 |
| 4169969 | Apparatus for detecting in-band signalling signals An apparatus comprising a stopband filter, a linear amplifier, a limiter circuit, a narrow band filter and a threshold circuit, insensitive to voice signals. When signalling signals are emitted with two frequencies, the apparatus comprises two channels ea... | 10/02/1979 |
| 4130737 | Two-link intercom system A two-path intercom system wherein a first link or path is non-exclusive and the second link or path is exclusive. When the system is idle, the first call is automatically switched to the second link or path when the called party answers. While the first ... | 12/19/1978 |
| 4110561 | Communication unit for code generation and voice communication Communication units for hand-held use, combining a microphone for voice communication with means for generating at least two code frequencies for signaling, are made more compact and economical by dual capability of a single amplifying circuit in oscillat... | 08/29/1978 |
| 4071715 | Push-button switch for a multifrequency dialling telephone set A push-button switch for a multifrequency dialling telephone set is described. By utilizing a connection group of three conducting reeds between the support plane and the telephone casing, at least two of which are rigid and rotatably mounted at one of th... | 01/31/1978 |
| 4064367 | Dual tone selector with answerback signalling A function control code sequence of signals, each comprising a pair of audio frequency tones, is transmitted from a control location to a remote station selector. Each input signal is applied to a tone decoder element which separates the two tones through... | 12/20/1977 |
| 4058805 | Digital multitone generator for telephone dialing A digital signal generator that produces multifrequency tones in the voice band range for use in telephone station sets utilizing multitone dialing. Amplitude information describing each of eight voice band frequencies is digitally encoded into a sequence... | 11/15/1977 |
| 4017695 | Customer operated gain control circuit A customer controlled gain circuit allows a customer to control the transmission amplifier gain in a trunk circuit by means of multifrequency signals. The trunk circuit contains a multifrequency receiver which receives and decodes gain control commands. T... | 04/12/1977 |
| 3997732 | Call tracing and identification system A call tracing and identification system for use with a public telephone network includes at least one interrogation and digital display circuit associated with a called-party telephone of the network, and an encoder circuit associated with a calling part... | 12/14/1976 |
| 3988549 | Keyboard type telephone station adapted to transmit dialling pulses and multifrequency signals Telephone set arrangement designed to be used as a computer terminal. It has a first call generator transmitting call pulse trains and a second call generator transmitting call multifrequency signals. During the call, the two kinds of call signals are tra... | 10/26/1976 |
