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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 5740035 | Self-administered survey systems, methods and devices Self-administered survey devices include a display, an input device, a memory and a control device which controls the display to show at least one survey question and control the memory to store a response to the at least one question. A system and method... | 04/14/1998 |
| 5235414 | Non-obtrusive programming monitor A meter for unobtrusively monitoring the tuning of a home entertainment center. The device is able to work with remote controls of components of the center. The present invention receives signals from the remote control(s), decides to which component the ... | 08/10/1993 |
| 5153882 | Serial scan diagnostics apparatus and method for a memory device A scan diagnostics apparatus and method is useful in connection with the memory integrated circuit. A shift register is provided which can receive data in parallel from the input register and output the data serially. The shift register can receive serial... | 10/06/1992 |
| 5067106 | Radiation detection and signal delay circuitry for protecting recorded data A radiation hardened or fail safe circuit is coupled between a peripheral data storage device, for example a disk drive, and its associated controller. The circuit includes an AND logic gate with two inputs: a write enable signal from the controller; and ... | 11/19/1991 |
| 5027355 | Logic circuit and design method for improved testability A method for designing integrated circuits for improved testability. A main logic function operable in initialization and test modes is defined in terms of component logic macros. Testability circuitry for generating CLEAR, CLEAR0 and CLEAR1 testability s... | 06/25/1991 |
| 5019899 | Electronic data encoding and recognition system The disclosure relates to an apparatus and method for creating digital signatures from frames of selected video segments such as TV commercials by a digitizing, compression and selection process which produces a multi-digit signature from each frame. The ... | 05/28/1991 |
| 4999771 | Communications network Data messages are transmitted between host data processors and a communications processor. Data messages from a communications processor are transformed for the host processor to which the message is assigned. Data messages from a host processor are trans... | 03/12/1991 |
| 4970643 | Mechanism for lock-up free cache operation with a remote address translation unit It is known to use a miss information holding register in a cache memory organization to store the details of a CPU load request on a cache miss so that the cache may accept subsequent requests pending the receipt of data in respect of the first request. ... | 11/13/1990 |
| 4958214 | Protective carrier for semiconductor packages An assembly is disclosed for releasably mounting a semiconductor package with respect to a rigid carrier, in a predetermined alignment with the carrier to protect the package leads and position the leads for electrical testing. Two substantially identical... | 09/18/1990 |
| 4958371 | Method and apparatus for determining when a telephone handset is off-hook Apparatus in an automatic telecommunications system which communicates between a central location and at least one remote location over the switched telephone network, senses changes in loading of the telephone line which correspond to a telephone going o... | 09/18/1990 |
| 4941119 | Method and apparatus for predicting an overflow in an integer multiply An overflow prediction scheme is provided to operate in parallel with an integer multiply within a computer to predict overflow conditions of the resultant register. The operands to be multiplied are examined to determine the position of the most signific... | 07/10/1990 |
| 4931722 | Flexible imbedded test system for VLSI circuits A logic chip contains a plurality of ranks of flip-flops with combinational logic elements connected in between the flip-flop ranks. Each flip-flop has at least two distinct data paths. The first path is for the normal passage of data to combinational log... | 06/05/1990 |
| 4922434 | Linear interpolation for a component placement robot Linear interpolation is applied to each pair of placement coordinates in a data driven surface mount component placement robot in order to eliminate component misplacement due to board artwork dimensional inaccuracies. The linear interpolation algorithm i... | 05/01/1990 |
| 4922184 | Apparatus and process for the simultaneous continuity sensing of multiple circuits An apparatus for simultaneously testing multiple integrated circuits includes a sensing circuit associated with each of the tested circuits. Each sensing circuit includes a differential amplifier with its positive input connected to the input of the test ... | 05/01/1990 |
| 4912709 | Flexible VLSI on-chip maintenance and test system with unit I/O cell design This application describes a peripheral cell structure for VLSI chips that requires the use of standard cells having both input and output capability connected to nearly all of the signal carrying pins. The cells function is alterable (to input or output ... | 03/27/1990 |
| 4912552 | Distributed monitoring system A system is disclosed which may be used for collecting television channel tuning data, household purchase data, VCR channel usage data and the like; on site at a plurality of preselected households, wherein the system concentrates and transmits the collec... | 03/27/1990 |
| 4905371 | Method for cleaning process control An apparatus and method for a cleaning process control is disclosed. The apparatus includes a printed wire circuit board that is made on a Pyrex glass or other transparent substrate. Components are attached to the printed wire circuit board and then the c... | 03/06/1990 |
| 4897764 | Conductive cooling cup module A metal heat spreading cup, hereinafter referred to as a "conductive cup module" ("CCM"), is utilized as part of the interface between at least one semiconductor being cooled and a pedestal, sometimes referred to as a "boss", coupled to a cooling medium. ... | 01/30/1990 |
| 4879672 | Method and apparatus for testing runout velocity and acceleration on a surface Disclosed is a Runout Velocity and Acceleration tester which converts an analog acceleration signal to a digital signal. The individual bits of digital data are then transformed into an exponential function. The exponential function that results is then s... | 11/07/1989 |
| 4878197 | Data communication apparatus A data communications apparatus transfers data between two channels, the data formats of each being incompatible with the other. Index registers receive index addresses from each channel to access a pointer in a pointer RAM. The pointer addresses a data l... | 10/31/1989 |
| 4860288 | Clock monitor for use with VLSI chips This application teaches that more accurate measurements of clock skew can be had by providing a clock monitor pin directly connected to the clock bus internal to the VLSI chip.... | 08/22/1989 |
| 4847800 | Input register for test operand generation Sequential faults are not tested for adequately when using test input operands generated in the chip from a random number generator to test the logic circuits in a very large scale integrated (VLSI) chip. Accordingly this application teaches the efficient... | 07/11/1989 |
| 4845741 | Modem ringing supression circuit An automatic telecommunication system includes a central location and at least one remote location where a data reporting system including a modem is situated. The central location establishes communications over the switched telephone network to the mode... | 07/04/1989 |
| 4827611 | Compliant S-leads for chip carriers A compliant S-shaped lead for resiliently supporting an integrated circuit chip package in spaced relation generally parallel to a printed circuit board. The S-lead bends and twists to absorb forces which would otherwise be exerted on solder joints due to... | 05/09/1989 |
| 4820927 | Electron beam source employing a photo-emitter cathode A scanned electron beam system employs an electron beam source using an NEA activated photo-emitter as the cathode. The activated photo-emitter cathode produces a pre-shaped electron beam having a relatively small spot focussed on a target plane. The beam... | 04/11/1989 |
| 4816904 | Television and market research data collection system and method A data gathering system includes a plurality of remote units which are controlled from a central location. Each of the remote units is attached to a television receiver which is generally but not necessarily attached to a cable system. Each of the remote ... | 03/28/1989 |
| 4791602 | Soft programmable logic array A programmable logic array is constructed of independently controllable logic building blocks of two types and special output logic to perform desired logic functions. The first building block is a functional element which is capable of performing any log... | 12/13/1988 |
| 4785161 | Laser machining for producing very small parts This invention teaches a method for producing small machined parts by laser including a description of how to avoid sensitive edges of the work piece being machined and how to control beam size for maintaining uniform cavity depth over a relatively long w... | 11/15/1988 |
| 4785412 | Double precision approximate quotient network A double precision approximate quotient network determines the quotient of a 2n bit number and an n bit number where the n bit number has a value of 2n-1 -2, 2n-1 -1, 2-1, or 2n+1. Apparatus determines the 2's c... | 11/15/1988 |
| 4782273 | Automatic part location and mechanical testing of part insertion This invention provides for a method and apparatus for assembly of complex systems by human operators with the assistance of automatic machinery. The machinery employes a lighted probe to direct the operator to insert a part of the lighted location and th... | 11/01/1988 |
| 4779198 | Audience monitoring system Each doorway or passageway between rooms in which a device may be located is fitted with another device which detects motion and the direction of the motion through the passage. Each room is equipped with a signal emitter that is controlled by the motion ... | 10/18/1988 |
| 4771251 | Ring oscillator An improved ring oscillator for VLSI chips is shown, formed at the chip periphery. It may have specific initiation gates and have additional parasitic capacitance added to the ring to enhance accuracy. The circuit elements used for the ring are the same a... | 09/13/1988 |
| 4761731 | Look-ahead instruction fetch control for a cache memory Certain stored program digital computer systems employ a single central memory to which requests are made for individual instruction words stored within it. Certain types of these memories employ address queues in which requests may be temporarily stored ... | 08/02/1988 |
| 4755147 | Flex head connector with ground plane A flexible head connector with a ground plane for connecting a daughter board to a mother board.... | 07/05/1988 |
| 4736520 | Process for assembling integrated circuit packages Automatic manufacture of integrated circuit packages including a leadless chip carrier is facilitated by providing, in strip form, flexible tape circuitry having a dielectric layer and a conductive layer. Through selective etching, regularly spaced centra... | 04/12/1988 |
| 4734041 | Electrical power connector An electrical power connector for PC boards or bus bars having low insertion force and low voltage drop across the connector. The connector features a female receptacle having a double set of opposing rows of multipoint spring contacts mating with a two-t... | 03/29/1988 |
| 4728799 | Height measurement and correction method for electron beam lithography system An improved method of height measurement and correction for a two-stage deflection ("fly's eye" lens) electron beam accessed lithography system is provided which employs a height measuring transducer such as a capacitance gauge or an optical gauge and a t... | 03/01/1988 |
| 4718019 | Election beam exposure system and an apparatus for carrying out a pattern unwinder In an electron beam system in which the beam is exposed in selected prescribed patterns on a target surface, stored pattern data specifies the location of the pattern as coordinates on the target plane of a reference point in the pattern, specifies the sh... | 01/05/1988 |
| 4708660 | Connector for orthogonally mounting circuit boards A connecting device is disclosed for electrically and mechanically linking multiple circuit boards arranged in two perpendicular stacks. The connecting device includes two identical connectors, each with a plurality of outwardly extended electrical socket... | 11/24/1987 |
| 4694178 | Multiple channel electron beam optical column lithography system and method of operation The invention provides an improved direct-write/read charged particle beam lithography/readout system employing multiple channel charged particle beam optical columns wherein a plurality of individually controlled, single deflector stage charged particle ... | 09/15/1987 |
