Combination cordless phone-fax modem-computer
What is claimed is: 1. A device for enabling a user to wirelessly transmit to and receive from a remote station a RF signal carried at a selected radio frequency said RF signal being messages generate... Read More
Inventors: Hsieh, Mingchih;, Assignee: |
Digital circuits for generating signal sequences for linear TDMA systems
FIG. 1 shows the waveform 10 of a particular illustrative Nyquist pulse. Advantageously, pulses of this form are generated in an overlapping fashion by the circuits described hereinbelow to represent... Read More
Inventors: Arnold, Hamilton W.; Sollenberger, Nelson R.;, Assignee: Bell Communications Research, Inc. (Livingston, NJ) |
Cellular telephone
It is, therefore, an object of the present invention to provide a cellular telephone in which the above problems can be overcome and which is provided with a telephone receiver of an improved structur... Read More
Inventors: Ma, Jong-Nam;, Assignee: |
Mobile telephone holder
The present invention provides a mobile telephone holder having a clamping mechanism that securely holds a mobile telephone within the holder, and allows easy movement of the mobile telephone from and... Read More
Inventors: Humphreys, Morris R.; Leman, Ari H.;, Assignee: Nokia Mobile Phones Limited (Espoo, FI) |
Portable radio telephone data terminal using cdpd
We claim: 1. A portable radio telephone data terminal comprising; (a) means for controlling Cellular Digital Packet Data (CDPD) communication by use of at least one CDPD channel; (b) means for control... Read More
Inventors: Schroeder, Martin K.; Peponides, Yorgos M.; Lubin, Michael L.;, Assignee: Cirrus Logic, Inc. () |
Vehicle voice data link
OF THE PREFERRED EMBODIMENT The present invention contemplates a communication system for use between one or more base data stations and a plurality of mobile vehicles. Typically, the mobile vehicles... Read More
Inventors: Reed, Roger R.;, Assignee: Cadec Systems, Inc. (Burlington, MA) |
Cordless telephone
I claim: 1. Cordless telephone comprising a fixed part which includes a reception section for receiving exact reception channel frequencies lying in a predetermined frequency range at equal intervals ... Read More
Inventors: Schuermann, Josef H.;, Assignee: Texas Instruments Incorporated (Dallas, TX) |
Transmission of data message during silent intervals of ringing for selection of terminal equipment
FIG. 1 illustrates switching office 100 that is interconnected to terminal 166 via telephone link 101 and interconnected to terminals 167-169 via telephone link 102. Switching office 100 has a plural... Read More
Inventors: Brown, Edwin Z.;, Assignee: Lucent Technologies Inc. (Murray Hill, NJ) |
Radio selection call receiver capable of increasing receiving ratio
What is claimed is: 1. A radio selection call receiver comprising: an antenna for receiving a radio signal to produce a received signal; a high frequency amplifier connected to said antenna for amplif... Read More
Inventors: Kobayashi, Yasuhiro;, Assignee: NEC Corporation (Tokyo, JP) |
Acoustic surface wave device
An object of this invention is to reduce influences due to acoustic surface waves reflected mechanically and field feed through phenomena in an acoustic surface wave device. Another object of this inv... Read More
Inventors: Okamoto, Takeshi; Minagawa, Shoichi; Niitsuma, Teruo;, Assignee: Clarion Co., Ltd. (Tokyo, JP) |
IIDT type surface acoustic wave device
An object of the present invention is to provide a novel IIDT type surface acoustic wave device which can balance inputs and/or outputs with no trouble in structure, thereby solving the aforementioned... Read More
Inventors: Kawakatsu, Takaharu; Tada, Yutaka; Ieki, Hideharu;, Assignee: Murata Manufacturing Co., Ltd. (JP) |
Balanced type surface acoustic wave device
Since the above mentioned first aspect of the present invention comprises a transmitting interdigital transducer with one terminal grounded, a receiving interdigital transducer to receive and transfor... Read More
Inventors: Onishi, Keiji; Eda, Kazuo; Taguchi, Yutaka; Seki, Shunichi;, Assignee: Matsushita Electric Industrial Co., Ltd. (Osaka, JP) |
Elastic surface acoustic wave filter device with balanced and unbalanced input/output terminals
The preferred embodiments of the present invention overcome the above-mentioned both problems with matching of impedance and problems with incompleteness of balance experienced by conventional devices... Read More
Inventors: Tada, Yutaka;, Assignee: Murata Manufacturing Co., Ltd. (JP) |
Resonator-type surface-acoustic-wave filter for reducing the signal strength of a spurious peak
The present invention attempts to solve the aforesaid problems. An object of the present invention is to realized a resonator-type SAW filter permitting higher extra-passband suppressibility by minimi... Read More
Inventors: Nakamura, Yoshitaka; Yamada, Sumio; Minemura, Sen;, Assignee: Fujitsu Limited (Kawasaki, JP) |
Telephone system having space divided speech channels and a separate time divided data highway
What is claimed is: 1. A telephone intercommunications system comprising a plurality of service terminal points at least some of which are constituted by the telephone stations of the system, a plural... Read More
Inventors: Williams, Ioan H.;, Assignee: Thorn-Ericsson Telecommunications (Mfg.) Limited (London, GB2) |
QAM encoding for high-definition television system
OF THE DRAWING Referring to FIG. 1, there is shown the 6 MHz bandwidth spectrum of a TV-channel, with respect to an out-of band reference frequency, employed by the proposed HDTV system disclosed in ... Read More
Inventors: Guida, Allan A.; Jonnalagadda, Krishnamurthy;, Assignee: General Electric Company (Princeton, NJ) |
F-modulation amplification
The present invention avoids the tremendous technological gap between RF IC amplifiers and their use in, for example, PCMCIA (credit card sized 3V) system specifications. This invention alleviates the... Read More
Inventors: Feher, Kamilo;, Assignee: |
Modular, portable data processing terminal for use in a radio frequency communication network
These and other objects of the invention are achieved in a portable data collection terminal comprising a first and second data processing unit as well as a radio transceiver selected from a plurality... Read More
Inventors: Koenck, Steven E.; Miller, Phillip; West, Guy J.; Mahany, Ronald L.; Kinney, Patrick W.;, Assignee: Norand Corporation (Cedar Rapids, IA) |
Portable radio information terminal
The objective of the present invention is to solve the above-mentioned tasks. The objective of the present invention is to provide a portable radio information terminal that can establish good radio c... Read More
Inventors: Kudoh, Kazuhiro;, Assignee: NEC Corporation (Tokyo, JP) |
Resynchronization of encryption systems upon handoff
In one aspect the system of the invention includes a duplex communication system employing cryptographically encoded data within a digital cellular telecommunications network in which there is generat... Read More
Inventors: Dent, Paul;, Assignee: Ericsson GE Mobile Communications Holding Inc. (Paramus, NJ) |
Method and apparatus for monitoring selected telecommunications sessions in an intelligent switched telephone network
It is an object of the present invention to provide a method for monitoring selected telecommunications sessions on an intelligent switched telephone network which permits any call made to or from a d... Read More
Inventors: O'Brien, William G.; Charlton, Thomas C.; Williams, L. Lloyd; Jones, Robert S.;, Assignee: Bell Canada (Montreal, CA) |
X-ray examination apparatus
What is claimed is: 1. An X-ray examination apparatus having an operating mode and transport mode comprising a patient table defining a longitudinal direction with a mobile base and a supporting means... Read More
Inventors: Van der Ende, Adrianus;, Assignee: U.S. Philips Corporation (New York, NY) |
Receiver IF system with active filters
It is an object of the present invention to overcome the deficiencies described above by providing a radio receiver and an integrated IF circuit with active bandpass filters, wherein the quality facto... Read More
Inventors: Lampe, Ross W.; Gillette, John T.; Dolman, Rodney A.; Montalvo, Antonio;, Assignee: Ericsson Inc. (Research Triangle Park, NC) |
Technique for reporting faults of base station of digital cellular system
An object of the present invention is to provide a technique for reporting faults occurring in a base station to a base station management unit more quickly. Another object of the present invention is... Read More
Inventors: Han, Sung-Hwan;, Assignee: Samsung Electronics Co., Ltd. (Suwon, KR) |
Method and system for implementing sub-tokens on a token ring network
OF THE PREFERRED EMBODIMENTS The present invention builds upon the physical and logical topology of a Class A FDDI token ring--a dual ring configuration. The invention employs logic that implements a... Read More
Inventors: Butter, Adrian S.; Kao, Chang Y.; Kuruts, James P.;, Assignee: International Business Machines Corporation (Armonk, NY) |
Combination acoustic conditioner and light fixture
What is claimed: 1. Sound generating apparatus adaptable for use in a room enclosure having a ceiling comprising a support, a bowl shape reflecting element mounted on said support, circuit means provi... Read More
Inventors: Propst, Robert L.; Randolph, Travis M.; Reyda, Theodore M.;, Assignee: Herman Miller, Inc. (Zeeland, MI) |
Time-division communication method for mobile bodies and system using said method
An object of the invention is to overcome the abovementioned problems. According to the invention, a clear derivation of the multiplexed load gain of a time-division time-compressed multiplexed (TCM) ... Read More
Inventors: Itoh, Sadao;, Assignee: Iwatsu Electric Co., Ltd. (Tokyo, JP) |
Distributed amplifier network management system
In accordance with a preferred embodiment, the present invention provides a management arrangement for maintaining a communication system serving a plurality of radio units in a frequency blocked area... Read More
Inventors: Burke, Timothy; Sohner, Harold K.; Junge, Hans-Hermann;, Assignee: Andrew Corporation (Orland Park, IL) |
Loudspeaker solderless connector system and method of setting correct pigtail length
a. Method of Setting Pigtail Length for Connection to a Solderless Connector The method of setting pigtail length in a solderless connection is critical to assuring audio quality, overcoming mechanica... Read More
Inventors: King, John A.; Murphy, II, Gerald Elloit;, Assignee: Essex Group, Inc. (Fort Wayne, IN) |
Method and apparatus for high-speed data exchange
The invention has the task of developing a process, a device and an interface circuit, which makes a rapid data exchange possible between a telecommunications transmitter and a data processor. The pro... Read More
Inventors: Bergler, Frank; Kauffert, Uwe;, Assignee: Alcatel N.V. (Amsterdam, NL) |
Cell Phones 
