Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 5321737 | Cordless telephone communication system having base stations with memory for quick access to information A communication system, for providing services to a plurality of subscribers, comprises a network controller, a base station, and a wireless mobile subscriber unit. The network controller includes a memory for storing a plurality of memory templates. Each... | 06/14/1994 |
| 5313654 | Method for transferring a private call from a trunking communication system to a cellular communication system In a geographic region that contains a trunking communication system and a cellular communication system, wherein the coverage area of each system substantially overlaps, a method that transfers a private call from the trunking communication system to the... | 05/17/1994 |
| 5311571 | Method and apparatus for performing inbound calling in a wireless communication system having fixed communication units coupled to a telephone system by a telephone line shared in common A wireless communication system includes a portable communication unit (PCU) (120) and a plurality of fixed communication units (FCUs) (102) covering a plurality of radio coverage areas (108, 110, 112). The FCUs are coupled to a telephone system (114) by ... | 05/10/1994 |
| 5309502 | Radio telephone having a cordless or cellular only mode and a cordless/cellular mode A radio telephone includes a cordless telephone fixed set and a mobile set. The cordless telephone fixed set is connected to a telephone line. The mobile set includes a first transmitter and a first receiver for radio communication with the cordless telep... | 05/03/1994 |
| 5307399 | Paging system that allows caller/subscriber interconnection A telecommunications system that performs meet-me paging. The telecommunications system of this invention includes a paging system that is designed to receive calls from meet-me paging system subscribers. Once such a call is received, the system parks the... | 04/26/1994 |
| 5303287 | Integrated personal/cellular communications system architecture An integrated PCN/DCN system architecture has a switching center, coupled to a public switched telephone network (PSTN), which selectively transfers signals between the PSTN and a digital cellular network (DCN) or a personal communications network (PCN) w... | 04/12/1994 |
| 5301225 | Method and system for dynamically regulating a power saving period within a radio telecommunication system A mobile radio telecommunication system and method provide battery-saving receiving of mobile stations. The mobile station autonomously changes the period of intermittence according to the frequency of paging in order to reduce the power consumption of th... | 04/05/1994 |
| 5285469 | Spread spectrum wireless telephone system A system for accessing a telephone system, in which a set of user stations are matched with a set of base stations for connection to a telephone network. Each base station may be coupled directly or indirectly to the telephone network and may be capable o... | 02/08/1994 |
| 5243640 | Integrated cellular telephone and vehicular audio system An output transducer and amplifier are shared between an audio system and a cellular Phone in an automotive vehicle. An interface arbitrates between the program audio signals and the phone audio signals to select or deselect each of the audio signals depe... | 09/07/1993 |
| 5239673 | Scheduling methods for efficient frequency reuse in a multi-cell wireless network served by a wired local area network A method includes a first step of receiving a message from a wired network (1) with at least one header station (12). The message is a message type that authorizes a header station or header stations to transmit on a wireless network. A second step of the... | 08/24/1993 |
| 5239674 | Method for transferring private data transmissions from a trunking communication system to a cellular communication In a geographic region that contains a trunking communication system and a cellular communication system, wherein the coverage area of each system substantially overlaps, a method that transfers a private data transmission from the trunking communication ... | 08/24/1993 |
| 5218716 | Method for locating a communication unit within a multi mode communication system In a geographic region that contains a trunking communication system and a cellular communication system, wherein the coverage area of the trunking system and cellular communication system substantially overlap and wherein some communication units are loc... | 06/08/1993 |
| 5212684 | Protocol and transceiver for cordless/cellular telephone service A communications system suitable for use with hand portable radio telephones operating in a cellular mode, the typical cell size being between 500 m and 3 km radius. Each cell comprising at least one primary or base station (10) connected to the PSTN and ... | 05/18/1993 |
| 5193101 | On-site system frequency sharing with trunking systems using spread spectrum A way of allowing small, low-power communication units to reuse trunked system communication resources within the service coverage area of the larger trunked system without experiencing significant interference from the trunked system. The low power units... | 03/09/1993 |
| 5179721 | Method for inter operation of a cellular communication system and a trunking communication system In a geographic region that contains a trunking communication system and a cellular communication system, where the coverage area of each system substantially overlaps, a method that enables a communication unit to operate in either system is disclosed. N... | 01/12/1993 |
| 5175758 | Cellular telephone system integrated with paging network A telephone system with which a connection between two subscribers can be established, at least one of them being a mobile subscriber. The system includes a paging network composed of one or several extensive paging ranges, each of them having a paging tr... | 12/29/1992 |
| 5153903 | Integrated paging and radiotelephone system having improved paging reliability A communication system is described which comprises a paging terminal for paging message delivery to a paging receiver and a cellular switch for call delivery to a personal communication transceiver. Utilized within the system are portable communication d... | 10/06/1992 |
| 4989231 | Mobile communication system and its control method A mobile communication system and a control method in which a line controller controls speech channels to be used by fixed transceivers. The line controller is coupled to wired telephone lines, and to a plurality of fixed transceivers. The fixed transceiv... | 01/29/1991 |
| 4922517 | System for interfacing a standard telephone set with a radio transceiver An interface system for interfacing a standard telephone set with a radio transceiver as part of a telephone network is provided. The radio transceiver may be a conventional cellular-type transceiver or other transceiver having typical control inputs and ... | 05/01/1990 |
| 4748655 | Portable telephones A personal portable telephone (11) allows the user access to the cellular radio network via a number of different gateways including a communal unit (15, 16), user's mobile telephone set (9), home telephone (13) or office PABX (14). The telephone (11) can... | 05/31/1988 |
| 4635285 | Communication system with voice priority for remote stations A two-way radio communications system of the simplex or half-duplex type having a communication link to a duplex telephone system is provided wherein the simplex or half duplex mobile radio is provided priority to talk upon demand. The communication link ... | 01/06/1987 |
| 4612415 | Dynamic control of telephone traffic in a trunked radio system A method and means for controlling telephone interconnect traffic on a trunked radio system is described. The present invention continuously monitors all types of communication traffic on the system and in response to an increasing dispatch access delay, ... | 09/16/1986 |
