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| Number | Title | Issue Date |
| 5056122 | Phase-shift keyed demodulation apparatus The present disclosure illustrates that the process of summing an amplitude limited PSK (phase-shift keyed) signal with a one data bit delayed version of that signal and envelope detecting the sum will produce a digital binary data stream that is represen... | 10/08/1991 |
| 5050993 | Diffraction encoded position measuring apparatus When a lightwave passes through a transmission grating, diffracted beams appear at the output or opposite side of the grating that are effectively Doppler shifted in frequency (phase) whereby a detector system can compare the phase of the zero order and h... | 09/24/1991 |
| 5029269 | Delayed power supply overvoltage shutdown apparatus A pulse-width modulated DC-DC power supply is illustrated with overvoltage protection which upon initial detection momentarily shuts down the pulse-width modulating portion of the control loop for a given cycle. If the overvoltage condition persists for m... | 07/02/1991 |
| 5002319 | Sheet metal latch apparatus A combination latch and handle which comprises an L-shaped piece of deformable plastic material having a pocket intermediate two locking protrutions. The pocket, which holds a spring metal clip, fits into a slot on the edge of a piece of sheet metal. The ... | 03/26/1991 |
| 4996698 | Clock signal resynchronizing apparatus When synchronous communication systems such as SONET (synchronous optical network) need to change data formats, the resulting periodically discontinuous clock signal associated with the data after overhead has been removed, has to be smoothed to a periodi... | 02/26/1991 |
| 4993790 | Holographic lenticular screen stereoscopic avoinics display apparatus Holographic techniques are utilized to create a lens or magnifying effect in a surface film. This surface film deflects the light rays so that they leave the film at a much different angle then they arrive at the film. Since holographically produced lense... | 02/19/1991 |
| 4994142 | Eliminating undercutting of mask material when etching semiconductor topography by native oxide removal It has been determined that etchants which are used in forming the topography of a semiconductor device act to etch very quickly semiconductor oxides as compared to the action on the semiconductor material itself. If the oxides are immediately below the s... | 02/19/1991 |
| 4967146 | Semiconductor chip production and testing processes Precisely controlled grooves are formed in a semiconductor wafer as part of a total photolithographic process of producing the circuitry and the V-grooves for precise registration of the circuitry relative the edges of the individual chips of the wafer. T... | 10/30/1990 |
| 4953116 | Digital word output high-pass filter apparatus A high-pass filter which provides a digital word output indicative of a high-pass filter function of the quantity of logic "1" inputs to the counter. The output of a counter is low-pass filtered and applied in conjunction with a bias signal to a second co... | 08/28/1990 |
| 4937820 | Method and apparatus for combining direct and indirect addressing schemes to multiplex further data with traffic data Typically time multiplexed switches use an indirect addressing scheme where a set of data bits in a first addressable memory define addresses in a second addressable memory as part of a read function to time switch an output data stream previously stored ... | 06/26/1990 |
| 4937533 | Deformable diplexer filter signal coupling element apparatus A deformable or flexible diplexer element provides a common input to two separate bandpass filter arrays. The construction of the element and the associated diplexer filter containers are designed such that the average distance between each end of the ele... | 06/26/1990 |
| 4937822 | Skywave adaptable communication apparatus An adaptive TDMA (time division multiple access) communication system is illustrated which dynamically maintains potentially different frequencies between nodes of the communication system using a process of communicating the quality of received signals b... | 06/26/1990 |
| 4915470 | Optical module connector apparatus An electro-optical module for facilitating connection between a fiber optic cable connector and an electrical circuit includes an interlocking tongue-and-groove design between the skirts of the module and an electro-optical active device. Within the elect... | 04/10/1990 |
| 4915795 | Plated-through hole plugs for eliminating solder seepage A process is illustrated to provide plated through holes for connecting between opposite sides of a circuit board such as an insulating ceramic substrate while maintaining a smooth surface on the circuit side to facilitate the process of defining the circ... | 04/10/1990 |
| 4888729 | Digitally controlled oscillator apparatus A variable frequency oscillator which is completely digital and does not use high frequency parts higher than 50 megahertz and yet operates at 50 MHz. Variable frequency is obtained by increment and decrement inputs supplied to a control block which selec... | 12/19/1989 |
| 4876699 | High speed sampled data digital phase detector apparatus A digital implementation of an analog phase detector is illustrated, wherein the novel aspect is the use of a low speed clock, which is passed through a delay line to provide ten different phases of clock signal. The circuitry is used to generate digital ... | 10/24/1989 |
