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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7349821 | Bi-directional signal converter A device and method for conversion of bi-directional signals using controlled dual value up/down counters uses a plurality of cascaded up/down counters chained together to alter the ratio of a maximum coefficient of N to N+1 for the first counter in the cascade of c... | 03/25/2008 |
| 7283926 | Counter circuits and distance estimation methods Counting circuits applied to distance estimation for ultra wideband (UWB) application, in which a first counting unit generates a sequence of pseudo-random number series not including zero, a first recoding unit records a first series and a second series from the se... | 10/16/2007 |
| 7272893 | Rolling electronic length measuring device An electronic measuring device is disclosed which includes a pair of wheels connected to an axle that passes through a drive gear. The drive gear is enmeshed to a second gear which, in turn, is coaxially connected to an encoder disk. The encoder disk has spaced-apar... | 09/25/2007 |
| 7248197 | A/D converter that is implemented using only digital circuit components and digital signal processing A TAD (time analog/digital) type of A/D converter has plural series-connected delay units each producing a delay in accordance with the level of a converter input voltage, with a first-stage delay unit receiving a pulse signal at commencement of each A/D conversion ... | 07/24/2007 |
| 7202692 | Semiconductor chip and method of testing the same A semiconductor chip includes a plurality of pads; a plurality of interface circuits connected with the plurality of pads, respectively; an internal circuit connected with the plurality of interface circuits; and a transfer circuit connecting the plurality of interf... | 04/10/2007 |
| 7178412 | Encoder failure detection An encoder failure detector system and method for detecting failure of an encoder at near-zero rotational speeds. For example, in one embodiment a failure is indicated if a torque command exceeds a selected threshold for a selected period of time and no movement of ... | 02/20/2007 |
| 7170009 | Method of interfacing a remote wand to electronics control chassis A method is provided for interfacing a remote wand to its electronics control chassis by means of a coiled cable. The wand may consist of a sensor such as a light-sensitive detector, and the control electronics provide amplification and processing of the received li... | 01/30/2007 |
| 7167194 | Printing a code on a product A method for printing is described. The method includes providing a printing system for printing a code on a product moving in a direction. The code is constructed from a plurality of pixels in a first data set indicating the positions of the pixels and generates a ... | 01/23/2007 |
| 7076886 | Slide caliper assembly and method of use A slide caliper assembly comprises a caliper including a shaft defining a gaging surface. A first jaw is coupled to and a second jaw is slidably coupled to the shaft. Each jaw defines a gaging surface. One of the jaws is adjustably pivotable relative to the shaft ab... | 07/18/2006 |
| 7075459 | Vehicle speed sensor for navigation system A vehicle navigation system includes a vehicle displacement sensor comprising a wireless transmitter generating a signal indicating rotational displacement of a vehicle component. A complementary wireless transmitter receives the signal from the transmitter. A compu... | 07/11/2006 |
| 7024790 | Double-axis belt-driven tape measure A measuring tape having a housing for receiving a spring-powered double-axis reel assembly. The reel assembly includes a primary spool having a length of measuring tape wound around it, and a secondary spool having a spring. The primary and secondary spools are conn... | 04/11/2006 |
| 7006948 | Diagnostic method for manufacturing processes A method for use in a system for diagnosing the causes of manufacturing defects involves process characterization. A set of forms is identified for a workpiece and for a piece of manufacturing equipment that acts upon the workpiece. The forms for the workpiece are p... | 02/28/2006 |
| 6998998 | High speed hazardous area communication with safety barriers A method and apparatus is disclosed for transmitting digital signals across safety transmission barrier. High data transfer rates are achieved for transfer from a safe certified device across the transmission barrier to a standard or non-rated device. A signal pair ... | 02/14/2006 |
| 6975932 | Technique for maintaining a separation between a vehicle and a detectable object In a control and management system for automobiles, a central processor in the system connects traditionally unrelated vehicle subsystems together to realize synergistic functions such as smart driving, automatic parking, etc. A master interface having a display is ... | 12/13/2005 |
| 6956423 | Interleaved clock signal generator having serial delay and ring counter architecture The interleaved clock generator generates N interleaved clock signals in response to an input clock signal. The interleaved clock generator comprises an interleaved clock generator of a first type for receiving the input clock signal and for generating M interleaved... | 10/18/2005 |
| 6952963 | Method for detecting a liquid level in a container in a circuit and a dialysis machine for actuating the method A container of a dialysis machine has a determined shape and a known volume occupied in part by a volume of a mass of blood; a remaining part is occupied by a volume of a mass of gas. A disturbance is induced in a combined mass of the liquid and the gas in the conta... | 10/11/2005 |
| 6922619 | System and method for selectively limiting tractive effort to facilitate train control Method for controlling the level of tractive efforts in a train having a first locomotive at a head end of the train, constituting a lead locomotive, and a second locomotive positioned in the train behind the lead locomotive, constituting a remote locomotive, with t... | 07/26/2005 |
| 6882697 | Digital counter A digital counter with a dial position having a hardware part which determines the n lowest-value bits of the dial position and a software part which determines the remaining higher-value bits of the dial position includes first and a second software parts as the so... | 04/19/2005 |
| 6772090 | Apparatus for secure storage of vehicle odometer values and method therefor An improved vehicle odometer is provided with an encoder and a microcontroller. The encoder has a unique key that configures an encryption algorithm. The encryption algorithm can be in the form of circuitry or software or any combination there between. The encoder r... | 08/03/2004 |
| 6759973 | High resolution position sensor A high-resolution position sensor device for use in precise positioning of servomechanisms, by providing increased resolution using of an encoder mounted on the shaft of a motor, which produces transition pulses through a light-sensitive arrangement using a photodet... | 07/06/2004 |
| 6746829 | Thermal development system and apparatus In a thermal developing method for continuously and thermally developing thermal developing sheets which have a latent image formed thereon by exposure and various sizes, a minimum temperature recovery time required for thermally developing a next thermal developing... | 06/08/2004 |
| 6473483 | Pedometer The pedometer having improved accuracy by being calibrated to actual user stride lengths and stride rates, and being recalibrated as necessary based on subsequent actual stride rates and lengths. The pedometer can also interact with a heart monitoring dev... | 10/29/2002 |
| 6332106 | Train handling techniques and analysis This is a method of analyzing train handling by setting a standard for the run, collecting train operating or handling data from the run and determining operating constraints during the run which are not included in the standard run. The determination of ... | 12/18/2001 |
| 6222899 | System for determining the deployed length of a flexible tension element The present invention provides a system for determining the deployed length of a flexible tension element such as cable which is wrapped in a pack and fed through a funnel. The element may be sensed using different types of sensors such as optical, acoust... | 04/24/2001 |
| 6181423 | Linear encoder providing engagement by engraving A linear measurement and control apparatus uses a press roll for directly engraving the surface of a linear control bar and then engaging the control bar which is attached to a machine element, to measure its linear motion and thereby identifying its posi... | 01/30/2001 |
| 5924057 | Method of preventing odometer fraud A method is provided for preventing odometer fraud on a vehicle having a multiplex ring including a plurality of vehicle control modules in electrical communication with each other. The multiplex ring includes a cluster control module with an odometer dis... | 07/13/1999 |
| 5835552 | Time counting circuit and counter circuit There is provided a time counting circuit for measuring a pulse spacing of a pulse signal with high accuracy and with low power consumption. An inverter ring composed of an odd number of inverters connected in a ring oscillates and one signal transition o... | 11/10/1998 |
| 5828717 | Time counting circuit and counter circuit There is provided a time counting circuit for measuring a pulse spacing of a pulse signal with high accuracy and with low power consumption. An inverter ring composed of an odd number of inverters connected in a ring oscillates and one signal transition occurs... | 10/27/1998 |
| 5757875 | Method of tooth detection A method for identifying a principal tooth in a series of teeth extending along at least a portion of a periphery of a rotatable object includes the steps of rotating the rotatable object, setting a counter to a predetermined value, measuring a first toot... | 05/26/1998 |
| 5757876 | Object counter and identification system A system for counting the number of objects of known thickness in a stack and identifying the objects by their color in which an ultrasonic sensor is mounted at a known distance from a reference point that defines the beginning of the stack. The ultrasoni... | 05/26/1998 |
| 5734688 | Interpolation pulse generating device with two-step interpolation Signals Sj and Sj-1 that are deviate from each other by a phase value of 2 π/M are generated by combining two sinusoidal detection signals. A reference signal ƊS is generated which represents a difference between the signals S... | 03/31/1998 |
| 5651039 | Method for determining the displacement of an object For determining a displacement of an object (41) from sheetlike material along an observing position (11, 12), each time the object (41) has been displaced over a particular distance, a pulse is generated. The passing object (41) is scanned, whereby a plu... | 07/22/1997 |
| 5583798 | Position measuring method and apparatus for generating periodic signals free of harmonics A position measuring method and apparatus for obtaining signals substantially free of harmonics with the aid of a periodic graduation and a non-periodic or aperiodic scanning graduation, wherein the position of the grating lines n within the scanning grad... | 12/10/1996 |
| 5257299 | Method and system for counting irregularly shaped moving articles A method and a system for counting irregularly shaped articles that are being moved along a path into and out of a machine. A microprocessor is responsive to three external devices with the first device being located at the input stage of the machine and ... | 10/26/1993 |
| 5246117 | Sorting machine including product length inspection A sorting machine is disclosed based on a procedure utilizing standard length pulses initiated by the sensing of the leading edge of a sensed product and rejecting a defective product based on sensing where its trailing edge is or should be if covered up ... | 09/21/1993 |
| 5177770 | Linear scale measuring device A linear scale measuring device of the absolute type capable of exhibiting high resolution and accomplishing the measuring operation with high accuracy. In the device, A cycle of indented lines for increment data is set to be twice as large as that of ind... | 01/05/1993 |
| 5170416 | Encoder duty-cycle error correction The present invention (50) corrects duty-cycle errors generated by imperfections in encoder scales and encoder detectors. A preferred embodiment of the invention operates by detecting successive transparent-to-opaque transitions of the encoder scale (20),... | 12/08/1992 |
| 5142793 | Digital linear measuring device A digital linear measuring device includes a housing, a reel located within a housing and a measuring tape wound on the reel. The measuring tape is extendable through an opening in the housing as the reel is rotated. An incremental measuring means is asso... | 09/01/1992 |
| 5131017 | Incremental position measuring system An evaluation device with an absolute value counter is provided in an incremental position measuring system, which determines the absolute position even in case of loss of the main power supply. The evaluation device is operated by means of an emergency p... | 07/14/1992 |
| 5127035 | Pulse counter circuit and displacement measuring device Disclosed is a pulse counting circuit for counting pulse signals comprising a first pulse signal generating means for generating a first pulse signal corresponding to an input signal, a counting means for counting at least either of said first pulse signa... | 06/30/1992 |
