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Ken Olsen, chairman and founder of Digital Equipment Corporation ; 1977
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| Number | Title | Issue Date |
| 7389207 | System for dynamic and automatic building mapping The automatic building mapping system comprises a tracker module that can be carried by a user and an optional command module which operate to automatically map the rooms of a building as a user traverses the rooms of the building. The tracker module includes a tran... | 06/17/2008 |
| 5191613 | Knowledge based system for document authentication The document authentication apparatus provides document authentication and authenticity capability. Document authentication requires that the person to be charged apply an authenticating mark on the document indicating intent to authenticate the document.... | 03/02/1993 |
| 5165482 | Fire deterrent system for structures in a wildfire hazard area The fire deterrent system operates in a preemptive manner by detecting the impending approach of a wildfire within the vicinity of the structure to be protected. The system includes apparatus to identify the locus and direction of spread of a fire while i... | 11/24/1992 |
| 5163091 | Knowledge based system for document authentication (apparatus) The document authentication apparatus provides document authentication and authenticity capability. Document authentication requires that the person to be charged apply an authentication mark on the document indicating intent to authenticate the document.... | 11/10/1992 |
| 4799255 | Communication facilities access control arrangement The communication facilities access control arrangement of the telephone munication system detects the dialing of an unauthorized or invalid long distance transmission facility access code and identifies the calling station. A record is maintained of all... | 01/17/1989 |
| 4775975 | Dial tone detection arrangement with a detection notification feature A dial tone detection arrangement for a PBX which provides a dial tone detection notification feature to a calling party is disclosed. The disclosed arrangement relieves the calling party from the burden of aurally monitoring the receiver of a station whi... | 10/04/1988 |
| 4748656 | Personal computer--as an interface between a telephone station set and a business communication system This invention is an interface arrangement which interconnects a business communication system with a telephone station set. This interface is implemented in a personal computer which serves to control the operation of the associated telephone station set... | 05/31/1988 |
| 4739509 | Automated message chronicling system This message chronicling apparatus consists of a personal computer interposed between the principal's telephone station set and the port circuit of the business communication system which serves the principal's telephone station set. The personal computer... | 04/19/1988 |
| 4727537 | Flow control arrangement for the transmission of data packets to a communication network A data transmission flow control arrangement for controlling the flow of data packets to a network as tramsmitted by one or more data transmitting and receiving devices via an interface is disclosed. The disclosed flow control arrangement provides circuit... | 02/23/1988 |
| 4706281 | Dynamic impedance element for a battery feed circuit Battery feed circuits function to supply a predetermined current to the communication pair and include circuitry to counteract the effects of balanced longitudinal signals which appear on the communication pair. Prior art battery feed circuits use either ... | 11/10/1987 |
| 4682354 | Automatic call coverage for unattended PBX stations An automatic call coverage feature arrangement for unattended PBX stations including attendant consoles. When an incoming call is received at an unattended station, a control processor monitors the number of ring cycles at the called station. The control ... | 07/21/1987 |
| 4680786 | Communication system for providing business communication features to cellular mobile telecommunication customers The subject communication system is an improved cellular mobile telecommunication system which provides business communication features to cellular mobile telecommunication customers. This is accomplished by using a business communication system as the switch ... | 07/14/1987 |
| 4672654 | PBX security system for monitoring security guard tours A security system arrangement utilizing a standard PBX for monitoring a plurality of concurrently administrable guard tours. A control processor of the PBX administers the security monitoring processing operation. This processing operation monitors the ac... | 06/09/1987 |
| 4653085 | Telephone switching system adjunct call processing arrangement The adjunct call processing arrangement of our invention eliminates the separation between hard-wired telephone switching system computer facilities and customer owned switchably connectable computer facilities. A general purpose communication interface i... | 03/24/1987 |
| 4652701 | Ringing application circuit This invention relates to line circuits and, in particular, to the apparatus contained therein for switching the ringing signal on to the communication pair which connects the line circuit to the telephone station set which it serves. Electromechanical re... | 03/24/1987 |
| 4649468 | Voltage divider circuit This circuit uses a simple structure of series-parallel connected capacitors and diodes to implement an n/m voltage divider circuit. There are n columns of series connected capacitors, which columns are all connected in parallel. The capacitor valves are ... | 03/10/1987 |
| 4646346 | Integrated message service system This integrated message service system provides a user with an indication of which of a plurality of message service systems contain unretrieved messages. This is accomplished by the serving telephone switching system maintaining a translation memory that... | 02/24/1987 |
| 4612416 | Integrated message service system This integrated message service system provides a user both with an indication of which of a plurality of message service systems contain unretrieved messages and access to these unretrieved messages. This is accomplished by the serving telephone switchin... | 09/16/1986 |
| 4602128 | Automatic redialing arrangement for multi-line telephone station sets The subject arrangement provides a last number dialed automatic redialing capability for each line of a multi-line telephone station set or attendant console. This is accomplished by maintaining a centralized last number dialed table on a per-line basis i... | 07/22/1986 |
| 4583182 | Controllable risk parameter for device control system The subject device control system provides a new method of determining when resource consuming loads are to be disabled to prevent the total resource consumption from exceeding a predetermined threshold. This system bases the decision making process on a ... | 04/15/1986 |
| 4546468 | Switching network control circuit Electronic business communication systems are generally comprised of a number of independent switching modules each of which is comprised of a time slot interchange circuit. These time slot interchange circuits are all interconnected by a separate central... | 10/08/1985 |
| 4539676 | Bulk/interactive data switching system Data communications connections between interactive terminals and host computers generally exhibit long holding times, while the data density of the transmissions is sparse. The circuit switch of a switching system is an inefficient and expensive medium f... | 09/03/1985 |
| 4538271 | Single parity bit generation circuit The subject parity circuit generates a single parity bit for a prescribed DATA SET. The DATA SET comprises n bytes which are simultaneously transmitted to the parity circuit over n data transmission leads. The n bytes are simultaneously combined bit by bi... | 08/27/1985 |
| 4535198 | Digital terminal keyboard dialing The digital terminal keyboard dialing arrangement of this invention enables a user to originate data calls directly from any digital terminal keyboard without requiring the use of an associated telephone station set. In particular, the subject telephone s... | 08/13/1985 |
| 4535199 | Data call transfer preindication The subject telephone switching provides for the redirection of established data calls to remotely located digital terminals and the reservation of these digital terminals at the time a data call is originated. In particular, a user can originate a data c... | 08/13/1985 |
| 4532377 | Data call transfer This data call transfer arrangement enables a calling party to originate a data call from a telephone station set and then transfer the data call to one of a number of predefined digital terminals. This is accomplished by operating the DATA button on the ... | 07/30/1985 |
| 4489386 | Device control system The subject device control system provides a new method of determining when resource consuming loads are to be disabled to prevent the total resource consumption from exceeding a predetermined threshold. This system bases the decision making process on pa... | 12/18/1984 |
| 4473719 | Switchhook status detector The subject switchhook status detector is part of a battery feed circuit and functions to sense the magnitude of the current flowing on both the tip and ring conductors. The detector also generates a sum signal which represents the total metallic current ... | 09/25/1984 |
| 4456996 | Parallel/series error correction circuit In a data processing system, the subject error correcting circuit is connected in the bridging mode to the data bus which interconnects a processor and a memory for error detection. It is presumed that the memory words obtained from the memory are relativ... | 06/26/1984 |
| 4424565 | Channel interface circuit with high speed data message header field translation and direct memory access The subject channel interface circuit functions in a multiprocessor environment to provide a high speed interface between a processor and the communication channel which interconnects all the processors. The communication channel carries data messages, wh... | 01/03/1984 |
| 4419542 | Battery feed circuit The battery feed circuit of the present invention does not rely principally on balanced current generation circuitry but, instead, uses a feedback circuit to ensure the production of the required currents on the communication pair. The subject feedback ci... | 12/06/1983 |
| 4272735 | Single amplifier variable gyrator The subject gyrator circuit is realized by a single amplifier and six resistors, which resistors are selected to satisfy a single equation. This permits great flexibility in setting the Z12 and Z21 impedance values without affecting ... | 06/09/1981 |
| 4266097 | Device control system The disclosed energy control system employs the serving electronic stored program PBX to regulate the operation of energy consuming devices located throughout a hotel/motel or office building in accordance with one or more modes of operation as offered by... | 05/05/1981 |
| 4258411 | Electronic device packaging arrangement The subject electronic device packaging arrangement is designed to enhance heat transfer from an electronic device to the printed circuit board to which it is attached. This is accomplished by employing a thermally conductive base having a depression in t... | 03/24/1981 |
| 4231087 | Microprocessor support system The disclosed microprocessor support system provides a total "laboratory" environment for developing and testing application software as well as for debugging the microprocessor-based application machine itself. The microprocessor support system contains ... | 10/28/1980 |
| 4178480 | Signal multiplexing circuit The disclosed signal multiplexing circuit (110) makes use of a single pair of wires (T, R) to interface a data and voice communication circuit such as an electronic key telephone (EKT) station set (100) with a central data and voice communication system s... | 12/11/1979 |
| 4171467 | Signal multiplexing circuit The disclosed signal multiplexing circuit makes use of a single pair of wires to interface a data and voice communication circuit such as an electronic key telephone (EKT) station set with a central data and voice communication system such as a business c... | 10/16/1979 |
| 4169215 | Signal limiting circuit The disclosed signal limiting circuit is bridged on to a bidirectional communication path (T, R) and functions to selectively attenuate excessive signals (2VA) being transmitted in a predetermined direction on the bidirectional communication pa... | 09/25/1979 |
| 4125813 | Operational amplifier decoupling circuit A sample and hold circuit is disclosed which employs a matched pair of operational amplifiers as a decoupling circuit to isolate the output of the sample and hold circuit from the sampling capacitor. Prior art decoupling circuits employ a simple isolation... | 11/14/1978 |
| 4123722 | Operational amplifier decoupling circuit A sample and hold circuit is disclosed which employs a matched pair of operational amplifiers as a decoupling circuit to isolate the output of the sample and hold circuit from the sampling capacitor. Prior art decoupling circuits employ a simple isolation... | 10/31/1978 |
