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| Number | Title | Issue Date |
| 5598439 | Method and apparatus for symbol clock phase recovery A method and apparatus for recovering the phase of a symbol clock operating at a predetermined symbol rate is described. A modulated RF signal which has been downconverted or a modulated baseband signal is filtered and sampled by a high speed converter. A... | 01/28/1997 |
| 4843338 | Ink-set printhead-to-paper referencing system Several problems of alignment associated with ink-jet printers are alleviated by four aspects. In the first, a reverse bow (B) in the paper (12) is created for printing on single sheets of paper. The reverse bow, which in the transverse axis of the paper,... | 06/27/1989 |
| 4811229 | Control system for automatic guided vehicles A control system for guiding a vehicle over a floor. The system includes a narrow length of retroflective tape applied to the floor to define a path, an array of LED-phototransistor sensors to generate light toward the tape and generate sensor output sign... | 03/07/1989 |
| 4808021 | Method and apparatus for storing accessories inside a printing device Method and apparatus for storing accessories inside a printing device, wherein the apparatus includes a storage enclosure, which is secured pivotally to the housing of the printing device, and which is capable of assuming at least one open position and on... | 02/28/1989 |
| 4808019 | Unified paper path printer A printer is disclosed having an improved paper feed mechanism. The improved paper feed system has a reduced cost and accepts a wide variety of paper types including continuous forms and single cut sheets fed both by hand and from a paper tray. Furthermor... | 02/28/1989 |
| 4809126 | Electrostatic discharge proof keypad A keypad which prevents electrostatic discharge from occurring in electronic equipment such as printers, computers and the like. The keypad includes a switch mechanism positioned on the circuit board associated with the electronic equipment. Attached to t... | 02/28/1989 |
| 4801894 | Frequency detector for frequency locked loop A frequency synthesizer circuit employs a frequency detector that receives a reference frequency signal and a variable frequency signal and that generates a difference output signal after detecting a complete cycle of the one of the reference frequency an... | 01/31/1989 |
| 4794859 | Active paper drop for printers An active paper drop mechanism (20) for ink-jet printers is provided. The mechanism comprises a pair of opposed, movable rail members (22) associated with opposed walls (14) of a horizontal-disposed output collection tray (12) for receiving sheets (10) of... | 01/03/1989 |
| 4786166 | Determination of focal plane for a scanning projection aligner An improved pattern of lines (26, 28) is placed on a wedged substrate (18) used to locate the focal plane of a scanning projection aligner. This pattern replaces the conventional array of microscopic resolution targets with large regions of microscopic li... | 11/22/1988 |
| 4779152 | Tape cartridge record/plackback apparatus A cartridge-handling arrangement for selectively transferring a tape cartridge from a fixed store holding a plurality of cartridges in a vertical stack, to a fixed record/playback station. The cartridge-handling arrangement comprises an elevator platform ... | 10/18/1988 |
| 4774493 | Method and apparatus for transferring information into electronic systems An apparatus and method are disclosed for transferring information into an integrated circuit over the power supply pins of the integrated circuit. The apparatus and method are used to load a test program into memory of the computer system and the system ... | 09/27/1988 |
| 4771234 | Vacuum actuated test fixture A fixture is disclosed for connecting circuit cards having electronic components to a board test system. The fixture is vacuum actuated. The test fixture comprises a fixture base and a support assembly. The fixture base comprises a board test system inter... | 09/13/1988 |
| 4767341 | Printed circuit card reset switch A printed circuit card includes a modified finger contact spanning two finger contact positions on its edge connector to momentarily short correspondingly adjacent receptacle contacts of a mating receptacle connector when the printed circuit card is eithe... | 08/30/1988 |
| 4759649 | Dual axis paper drive Method and apparatus are provided for moving perforated continuous paper (10) through a dual axis printer (12), with both axes (14, 30) driven, while regulating the feed with the perforations and maintaining a controlled tension (38a) in the paper between... | 07/26/1988 |
| 4759626 | Determination of best focus for step and repeat projection aligners A reticle design is provided for step and repeat projection aligners which, when patterned on a wafer (10), allows quick macroscopic evaluation of best focus for used in fabricating integrated circuits. The reticle pattern consists of opaque lines and spa... | 07/26/1988 |
| 4758863 | Multi-image reticle A multi-level reticle is described which comprises a multiplicity of integrated circuit mask patterns. The mask patterns are positioned in separate areas on the reticle. The reticle is adapted to be positioned in a projection stepper apparatus for project... | 07/19/1988 |
| 4755966 | Bidirectional branch prediction and optimization A method and apparatus for efficient branching within a central processing unit with overlapped fetch and execute cycles which optimizes the efficient fetching of instructions.... | 07/05/1988 |
| 4756012 | Surface mounted device parts counter A method and apparatus for counting the exact number of electrical circuit components carried by a length of component dispensing tape is disclosed. In the preferred embodiment, the invention uses optical detectors to detect the transmission of light thro... | 07/05/1988 |
| 4728963 | Single sheet ink-jet printer with passive drying system A novel ink-jet printer (10) is provided. The printer provides both paper supply tray (12) and paper collection tray (18) in the front (14) of the printer for ease of paper handling and reduced footprint. The paper collection tray is provided with a pair ... | 03/01/1988 |
| 4703457 | Register circuit used to load, hold, and dump digital logic signals A register sub-circuit for a logic system is described which is capable of loading a logic signal from a bus, holding the state of the logic signal, and dumping the logic signal onto a precharged high capacitance bus. The circuit is master/slave in operat... | 10/27/1987 |
| 4658161 | Split phase loop An apparatus and method are described for generating a plurality of clock edges from a reference clock signal. The clock edges which are generated are locked in phase with the reference clock signal. The edges may be at any integral or non-integral multip... | 04/14/1987 |
| 4656541 | Front loading cartridge activated clamp and eject mechanism A manual, front loading, cartridge activated clamp and eject mechanism for a magnetic tape cartridge is disclosed which conforms with ANSI X3.55-1977 Standard for positioning the tape cartridge. The mechanism combines the clamp and eject functions and has... | 04/07/1987 |
| 4596940 | Three state differential ECL bus driver A three state Emitter Coupled Logic (ECL) differential bus driver is capable of driving a multiply driven balanced ECL bus which is isolated from a supply voltage VEE and therefore provides isolation from ground loops, higher performance, lower... | 06/24/1986 |
| 4508591 | Polymethyl methacrylate compatible silicon dioxide complexing agent An etching solution for the dissolution of silicon dioxide through a portable conformable mask, with PMMA as the etch stop layer, has been developed which eliminates resist lifting and non-uniform lateral etching, thereby providing the improved oxide edge... | 04/02/1985 |
