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"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 6107892 | Method for reduction of phase noise in microwave voltage-controlled oscillators Phase noise in an RF oscillator is significantly reduced by loosely couping another quieter RF oscillator having noise patterns uncorrelated to the first RF oscillator so that it frequency locks with the first RF oscillator. The coupling is increased unti... | 08/22/2000 |
| 6069945 | Global subscriber numbering translation system for controlling international call routing A called number processing system transforms called/dialed telephone numbers into a unique global routing number. In the process called numbers are analyzed and based on the called/dialed number a Regional Administration Code is allocated and the dialed g... | 05/30/2000 |
| 5739711 | Regulation circuit for bipolar voltage switching circuits having logic circuitry using a single error amplifier for regulation of both positive and negative voltages A circuit suitable for use in a regulated bi-directional output power supply requiring controlled transitions between states, such as in a Battery Polarity Switch is provided to utilize many of the same circuit components in regulating both opposing polar... | 04/14/1998 |
| 5673794 | Constraining sleeve device for stabilizing battery casing contour A constraining sleeve device is applied to a plastic battery casing to prevent distortion of the casing contour. A metal constraining sleeve slides onto and over a broad face or side of the plastic battery casing and provides constraining forces to mainta... | 10/07/1997 |
| 5655003 | Wireless terminal having digital radio processing with automatic communication system selection capability A wireless terminal utilizing digital radio processing utilizes stored program control to allow the wireless terminal to operate in a plurality of disposed wireless communication systems. In particular, the digital radio processing with appropriate stored... | 08/05/1997 |
| 5592470 | Broadband wireless system and network architecture providing broadband/narrowband service with optimal static and dynamic bandwidth/channel allocation A wireless broadband communication system architecture is structured to provide an array of narrowband and broadband services to an end user on demand. The bandwidth of delivery is dynamically adjusted to deliver and satisfy service requirements by utiliz... | 01/07/1997 |
| 5327319 | Common mode voltage surge protection circuitry A common mode lightning protection circuit includes a series circuit including a Y-capacitor and breakdown device connected between a current carrying input line and the frame ground of the power supply. This arrangement permits the ready application of c... | 07/05/1994 |
| 5327333 | Push push DC-DC reduced/zero voltage switching converter with off-set tapped secondary winding A DC-DC converter utilizes a tapped transformer secondary winding as a means of achieving output voltage ripple cancellation. This ripple cancellation occurs at a specified input voltage. It operates by fixing the location of a tap on the secondary windin... | 07/05/1994 |
| 5224151 | Automatic handset-speakephone switching arrangement for portable communication device A personal communicator handset is designed to operate as both a handset and as a speakerphone and to automatically switch between the two modes based on distance between the handset and the user's ear. This distance is determined by an infrared range det... | 06/29/1993 |
| 5206820 | Metrology system for analyzing panel misregistration in a panel manufacturing process and providing appropriate information for adjusting panel manufacturing processes A metrology system to analyze panel misregistration in a panel manufacturing process includes a software controlled system which checks defined panel parameters on the four corners of a panel and related artwork for processing with a master pattern etched... | 04/27/1993 |
| 5201584 | Mechanism for preloading linear bearing slides A linear bearing slide assembly comprises an outer member, an inner member, a pair of linear bearing mechanisms, a preloading bar and a longitudinal spring. The outer member has a primary channel opening for accepting the inner member, and two secondary c... | 04/13/1993 |
| 5195137 | Method of and apparatus for generating auxiliary information for expediting sparse codebook search In many applications involving the coding and processing of speech signals the relevant applicable codebook is one which may be termed a sparse codebook. That is, the majority of elements in the codebook are zero valued. The searching of such a sparse cod... | 03/16/1993 |
| 5179365 | Multiple turn low profile magnetic component using sheet windings A magnetic component (i.e. inductor or transformer) utilizes sheet winding patterns designed to enhance component assembly and maximize utilization of the core window areas. The windings are obtained from a copper sheet from which sheet winding patterns a... | 01/12/1993 |
| 5177780 | Method of voice mail notification for cellular telephone systems A voice mail notification arrangement provides an audible notification to a mobile radiotelephone subscriber that one or more incoming calls have been redirected to the subscriber's mailbox. An unanswered incoming call is directed to the voice mail system whic... | 01/05/1993 |
| 5175878 | Radio network with switching arrangement for coupling radios to a selected antenna out of a plurality of antennas The antennas of a cellular telephone system are each connected to a signal divider/combiner array which/divides combines the antenna connecting path(s) into a plurality of antenna-radio/radio-antenna connecting paths. The divider array aspect is used for ... | 12/29/1992 |
| 5153541 | Folded interdigital notch filter An interdigital resonant cavity filter structure is foled to provide two adjacent chambers physically positioned side by side and electrically connected in series with each other. A center plate divides the two chambers with a slot at one end of the struc... | 10/06/1992 |
| 5150377 | Direct sequence spread spectrum (DSSS) communications system with frequency modulation utilized to achieve spectral spreading Hardware complexity of transmitting and receiving equipment in a CDMA (Code Division Multple Access) cellular radio transmission system, embodying the principles of the invention, is reduced by the use of frequency modulation (FM) techniques to achieve sp... | 09/22/1992 |
| 5146396 | Single stage power factor corrected converter having isolated output A power converter is operative to reduce harmonics at an AC input by controlling its power switching so that a current waveform in a switched inductor is substantially identical to a rectified version of the input AC voltage waveform. The voltage spikes i... | 09/08/1992 |
| 5138543 | Output voltage estimating circuit for a power converter having galvanic isolation between input and output circuits A method of and apparatus for monitoring the output signals of a power converter, having galvanic isolation between the input and output, observes the voltage and current on the primary side of the converter as reflected through a tertiary winding or infl... | 08/11/1992 |
| 5136612 | Method and apparatus for reducing effects of multiple access interference in a radio receiver in a code division multiple access communication system A CDMA system embodying apparatus and methods operates to reduce the effects of the multiple access interference in order to increase the channel capacity and achieve greater efficiency in the use of a given frequency bandwidth. Reception of CDMA radio tr... | 08/04/1992 |
| 5134709 | Process and apparatus for flexible channel assignment in cellular radiotelephone systems A channel assignment system provides channel assignments to make effective use of the available frequency spectrum by assigning one channel at a time until all the channels in the allotted frequency spectrum are used. A pre-allocation step assigns specifi... | 07/28/1992 |
| 5118964 | Thermo-electric temperature control arrangement for laser apparatus A thermo-electric laser temperature control apparatus is driven by a switching mode control circuit. Driving current polarity determines if the thermo-electric apparatus is operating in a heat absorbent or heat generating mode. A sequencing control circui... | 06/02/1992 |
| 5115185 | Single conversion power factor correction using septic converter A SEPIC converter powered off line is controlled to improve the input power factor by forcing the current in the input inductor to assume the same wave shape as the voltage across the inductor in series with the power switch to insure a sinewave input cur... | 05/19/1992 |
| 5097499 | Autonomous registration overload control for cellular mobile radio systems Registration signal channel overloads occurring due to overly numerous autonomous registration messages initiated by the mobile radiotelephones are averted by monitoring the number of autonomous registrations occurring or requested in a particular local c... | 03/17/1992 |
| 5070453 | System and method for scheduling data transfers among a plurality of data processing units to avoid conflicting data requests A method for allocating resource use to a process having a plurality of tasks in which a set of signals identifying the interferences in resource use among the plurality of tasks is generated and a signal representing an initial non-interfering allocation... | 12/03/1991 |
| 5055971 | Magnetic component using core clip arrangement operative for facilitating pick and place surface mount A core securing clip to hold the two core members of the core of a surface mount magnetic component together is designed with a large planar surface to provide a suitable surface to facilitate the use of pick and place apparatus in mounting the magnetic c... | 10/08/1991 |
| 5054035 | Digital signal quality evaluation circuit using synchronization patterns In evaluating the quality of received digital signals in terminals of a mobile communication system, the bit error rate is measured. Each station receives signals in successive data frames which includes a synchronization pattern and stores a version of t... | 10/01/1991 |
| 5051880 | Mixed mode regulation controller for a resonant power converter Frequency variation in a resonant zero voltage switching (ZVS) power converter is combined with supplemental duty cycle modulation to obtain voltage regulation and to narrow the required frequency band needed for regulation of a given output load. These t... | 09/24/1991 |
| 5036452 | Current sharing control with limited output voltage range for paralleled power converters Current sharing between paralleled power converters is attained by adjusting the error signal in the converters regulation circuit to assure that all the paralleled converters have a regulated output voltage that forces the converters to share the load eq... | 07/30/1991 |
| 5023565 | Linear amplifier with automatic adjustment of feed forward loop gain and phase A linear amplifier includes a feed forward circuit which is operative to eliminate distortion of the amplified signal by utilizing a second circuit path parallel to the amplification path to generate a distortion cancellation signal and combine it with th... | 06/11/1991 |
| 5023902 | Radio channel unit message and control signal processing architecture A new architecture for a cellular radio telephone system groups all of the critical cellular functions within a single circuit package in order to provide enhanced versatility to accommodate changes in requirements, including processing means and channel ... | 06/11/1991 |
| 5018187 | Mobile telephone intrasystem and intersystem enhanced handoff method and apparatus for limiting trunk switching connections A method and apparatus to minimze the number of connecting trunks and MTSOs is operative to minimize the number of tandem MTSOs involved in handing the call by determining if the target MTSO has inter MTSO trunk connections with at least one of the MTSOs ... | 05/21/1991 |
| 5014413 | Method and apparatus for facilitating loading of a panel processing machine and positioning of artwork on a work surface thereon A method and apparatus for positioning a locating mechanism and the artwork frame of a panel processing machine has been devised utilizing a flexible beam apparatus for suspending the panel location mechanism and artwork frame which permit these devices t... | 05/14/1991 |
| 5012490 | Varying bandwidth digital signal detector A digital communication system has a plurality of channels with distinct carrier frequencies and overlapping bands. Each receiver includes a filter having a time varying bandwidth. The received signal includes at least one carrier modulated by an informat... | 04/30/1991 |
| 5010574 | Vector quantizer search arrangement In an arrangement for coding multi-element signals such as used in speech or image processing, a plurality of N element reference signals representable in a prescribed vector space are stored. An N element input signal representable in the prescribed vect... | 04/23/1991 |
| 5008644 | Terminal assembly for linear magnetic component bobbin A new physical construction for attaching a phosphor bronze terminal to a plastic bobbin assembly permits a lower component height and a reduced footprint size as well as providing improved positive mechanical locking of the bobbin pinouts to the bobbin. ... | 04/16/1991 |
| 4999743 | Transformer with included current sensing element A current sensing element is included as an integral part of a magnetic component by mounting a toroidal magnetic core having a current sensing winding into a receptacle of a winding bobbin of the magnetic component. This eliminates a need for a separate ... | 03/12/1991 |
| 4891746 | Method of optimizing the efficiency of a high frequency zero voltage switching resonant power inverter for extended line and load range A power inverter efficiency is optimized at high frequency in a fully resonant inverter operating with a range of load impedance that takes into consideration switching loss and conducting loss as a combined overall effect. Within this range of load imped... | 01/02/1990 |
| 4849874 | Single mag amp control system for regulating bipolar voltage output of a power converter A power converter embodying the principles of the invention, and having a positive and negative output utilizes a single magnetic amplifier controller to control two saturable inductor cores utilized to regulate the positive and negative outputs by modula... | 07/18/1989 |
| 4419723 | Regulation of multiple-output DC-DC converters A multiple-output DC-DC converter has an electronically controllable reactor (64,66) connected in series with each output circuit. In response to variations in voltage of the output circuits (80,82), control signals are fed back to vary the permeance of t... | 12/06/1983 |
