Two-way paging system having reverse channel message frequency authentication
A method of modifying reverse channel messages in a two-way paging system to authenticate reverse channel messages is disclosed. The intended frequency of the reverse channel message is converted into... Read More
Inventors: Fawcett, Glenn S.;, Assignee: Glenayre Electronics, Inc. (Charlotte, NC) |
Wide bandwidth ultra high stability FM telemetry transmitter
The wide bandwidth high stability FM transmitter of the present invention provides highly reliable and repeatable signal telemetry that is free from undesirable thermal and loading effects while utili... Read More
Inventors: Dinsmore, Mark T.;, Assignee: Transkinetic Systems, Inc. (Canton, MA) |
Electronic countermeasure sequence timer
What is claimed is: 1. A random period time sequencer for causing the device to which it is coupled to pseudo-randomly alternate between its operating modes, comprising: a power supply; a digital shif... Read More
Inventors: Jones, Gerald N.;, Assignee: The United States of America as represented by the Secretary of the Navy (Washington, DC) |
Automatic reprogramming means for countermeasures system
OF THE PREFERRED EMBODIMENT Referring now to FIG. 1, there is illustrated thereby a block diagram of a countermeasures system incorporating the several features of the present invention. The transmit... Read More
Inventors: Pringle, Robert D.; O'Berry, William A.;, Assignee: The United States of America as represented by the Secretary of the Air (Washington, DC) |
Random problem generator
In accordance with the present invention, a random problem generator selects a formula from a database of formulas, randomly generates an initial condition necessary to solve the selected formula, and... Read More
Inventors: De Almeida, Victor James;, Assignee: Fogcutter, LLC (Midland, TX) |
Using a signal with increased power for determining the position of a mobile subscriber in a CDMA cellular telephone system
The present invention is directed to a method for determining the position of a mobile station within a cellular telephone system having a plurality of base stations. A signal is transmitted at a low ... Read More
Inventors: Gilhousen, Klein S.;, Assignee: Qualcom Incorporated (San Diego, CA) |
Mobile communication system having a control for limiting the number of carriers based on the level of intermodulation distortion
It is an object of the present invention to provide a mobile communication system which eliminates possible high levels of intermodulation distortion and prevents each amplification circuit from havin... Read More
Inventors: Kobayashi, Fumihiko; Hasegawa, Junichi;, Assignee: Fujitsu Limited (Kawasaki, JP) |
Method of informing a subscriber in a radio telephone system of facilities activated for the subscriber station
The object of this invention is to avoid the above-mentioned problems occurring in the solutions according to the prior art. Consequently, the object of the present invention is to offer the user of t... Read More
Inventors: Suikkola, Rauno; Toyryla, Hannu;, Assignee: Nokia Telecommunications Oy (Espoo, FI) |
Transmission method and radio system
OF THE INVENTION The solution of the invention is particularly applicable for use in a radio system of the GSM type without, however, restricting to it. Let us first study the inventive method and re... Read More
Inventors: Piirainen, Olli; Niemela , Kari;, Assignee: Nokia Telecommunications Oy (Espoo, FI) |
System and method for providing numeric-only paging service with wireless telephone service
OF THE PREFERRED EMBODIMENT The drawing illustrates a communications system generally designated 10 for providing traditional, numeric-only paging service to subscribers of digital wireless telephone... Read More
Inventors: Dwyer, Christopher Brian; Wilber, Carl Dean;, Assignee: |
Color image data processing device featuring ghost elimination
OF THE INVENTION FIG. 3 shows a color image data processing device used in a reading device adapted to read red and black. The reading device receives a black signal (color signal) 11 and a red signa... Read More
Inventors: Noguchi, Akio;, Assignee: Fuji Xerox Co., Ltd. (Tokyo, JP) |
RSA Public-key data encryption system having large random prime number generating microprocessor or the like
The present invention relates to public-key encryption systems, which employ the RSA so-called "trap-door, one-way permutation" data encryption. More particularly, the present invention relates to the... Read More
Inventors: Miller, William J.; Trbovich, Nick G.;, Assignee: Racal-Milgo, Inc. (Miami, FL) |
Apparatus for detecting sonar signals embedded in noise
Briefly, there is provided an apparatus for detecting sonar signals embedded in noise includes a neural network trained to detect signals in response to the slope of amplitude rank ordered noise corre... Read More
Inventors: Freeman, David F.; Fonseca, William J.;, Assignee: GTE Government Systems Corporation (Waltham, MA) |
Method of and device for improving the quality of fresh concrete and preventing adhesion and hardening of the fresh concrete in a mixer drum of a concrete mixer truck or of a concrete mixing plant
A principal object of this invention is to provide a method of improving the quality of fresh concrete and preventing adhesion and hardening of fresh concrete on a plurality of rotary blades and aroun... Read More
Inventors: Sakamoto, Norio;, Assignee: Kabushiki Kaisha Remic-Asano (Tochigi, JP) |
Rotary-anode X-ray tube
What is claimed is: 1. A rotary anode X-ray tube including an anode comprising a graphite disc having a central opening, and a bushing in the opening affixed to the disc to facilitate mounting of the ... Read More
Inventors: Hubner, Horst; Lersmacher, Bernhard;, Assignee: U.S. Philips Corporation (New York, NY) |
Adjustable attenuation equalizer
What is claimed is: 1. Attenuation equalization in the circuit of an adjustable four-terminal network for correcting the frequency-related attenuation curve of cables comprising a bridged T circuit co... Read More
Inventors: Hindermayr, Martin; Koerner, Georg;, Assignee: Wilhelm Ruf KG (Munich, DT) |
Rotary waveguide switch having arcuate waveguides realized by planar faces
According to the present invention, a waveguide switch of the above described type is modified in that: the straight central waveguide passage is given a cross-sectional taper toward the center of the... Read More
Inventors: Hettlage, Eckart; Ruff, Gerd;, Assignee: Teldix GmbH (Heidelberg, DE) |
Lubricant and motor fuel additives
I claim: 1. As a new composition, an oil-soluble boron-containing composition having a boron concentration in the range of 0.75 to 1.5 percent by weight which is the reaction product obtained upon rea... Read More
Inventors: Schiff, Sidney;, Assignee: Phillips Petroleum Company (Bartlesville, OK) |
Organophilic clay gellants
I claim: 1. An organoclay slurry comprising from about 20% to about 50% by weight of an organophilic clay, from about 50% to about 80% by weight of an aqueous solution of a low molecular weight polar ... Read More
Inventors: House, Roy F.;, Assignee: Venture Innovations, Inc. (Lafayette, LA) |
Intelligent automatic gain control circuit
The present invention relates to a technique and apparatus relevant to systems such as the U.S. Navy Link-11 and Link-14 computer-to-computer systems and to any other computer-to-computer communicatio... Read More
Inventors: Dickinson, John D.; Writer, Philip L.;, Assignee: The United States of America as represented by the Secretary of the Navy (Washington, DC) |
Microprocessor controlled AGC
It is an object of this invention to provide an MLS receiver with a microprocessor controlled automatic gain control. The apparatus according to the invention is for receiving a first scanning signal ... Read More
Inventors: Cafarella, Thomas; Enein, Mohamed;, Assignee: Hazeltine Corporation (Commack, NY) |
Circuit and method of suppressing inter-station radio tuning noise
The audio stage of an FM radio is partially schematically shown in FIG. 1 as a low-frequency source, shown merely as a generator coupling resistor 1. A signal transmission path extends for example fr... Read More
Inventors: Wieschhoff, Reinhard; Seibold, Peter;, Assignee: Blaupunkt Werke GmbH (Hildesheim, DE) |
Monitoring system for optical transmission line repeaters
It is an object, therefore, of the present invention to overcome the disadvantages and limitations of a prior optical cable monitoring system by providing a new and improved monitoring system for opti... Read More
Inventors: Sato, Masanori; Niiro, Yasuhiko; Wakabayashi, Hiroharu;, Assignee: Kokusai Denshin Denwa Co., Ltd. (Tokyo, JP) |
Piezoelectric electroacoustic transducer
We claim: 1. An electroacoustic transducer comprising a dielectric body centered on an axis and provided with a central plateau surrounded by an annular recess, an apertured dielectric cover overlying... Read More
Inventors: Pipitone, Roberto; Gnocchi, Colombo;, Assignee: Societa Italiana Telecomunicazioni Siemens S.p.A. (Milan, IT) |
Support arrangement for a flexible sound generating diaphragm
It is therefore an object of the invention to provide a mounting arrangement for piezoelectric transducers that simplifies assembly of the transducer. Another object of the invention is to provide a m... Read More
Inventors: Boyles, Robert L.; Polonsky, Samuel;, Assignee: General Electric Company (New York, NY) |
Acoustic insulator for a telephone handset microphone
The present invention encompasses an acoustic insulator substantially comprised of a single piece of material formed into two elements. One element has a larger diameter than the other with a series o... Read More
Inventors: Stinauer, Robert J.; Stein, Michael A.;, Assignee: Motorola, Inc. (Schaumburg, IL) |
Telephone privacy device
According to one aspect of the invention a telephone privacy protector for connection to a common exchange line and each one of at least two telephone line operated devices sharing the line includes a... Read More
Inventors: Eftechiou, Vakis;, Assignee: |
Adaptive multipath equalization
The invention meets these needs by providing method and apparatus for using a plurality (preferably four or more) of correlators to identify detailed features of a correlation function at and adjacent... Read More
Inventors: Enge, Per; Farmer, Dominic; Schipper, John F.;, Assignee: Trimble Navigation Limited (Sunnyvale, CA) |
Receiver having a memory based search for fast acquisition of a spread spectrum signal
OF THE INVENTION FIG. 1 is a block diagram of a (global positioning system) GPS receiver of the present invention referred to by the general reference number 10. The GPS receiver 10 receives a GPS si... Read More
Inventors: Lennen, Gary R.;, Assignee: Trimble Navigation Limited (Sunnyvale, CA) |
Phase-noise compensated digital communication receiver and method therefor
Accordingly, it is an advantage of the present invention that an improved phase-noise compensated digital communication receiver and method are provided. Another advantage is that the influence of pha... Read More
Inventors: Cochran, Bruce A.;, Assignee: Sicom, Inc. (Scottsdale, AZ) |
Telecommunications 
