Did You Know...
...that Robert Adler has the dubious distinction of being the Father of the Couch Potato? Back in 1955 Adler was employed by what was then Zenith Radio Corp., where he was charged to invent something that would allow viewers to turn down the TV volume without leaving their chairs. After a series of flops (such as a wired contraption that people tripped over), Adler hit on the idea of using sound waves. Thus the Remote Control was born...
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5594436 | Signal processing channel with high data rate and low power consumption An apparatus and method for detecting analog signals representing patterns of n-bit RLL-encoded data read from a data storage device. R integrators each integrate the analog signal over successive time periods consisting of a preselected number n of bit c... | 01/14/1997 |
| 5537424 | Matched spectral null codes with partitioned systolic trellis structures Apparatus and method for transmitting spectral null sequences of a spectrally-constrained code over a partial response channel. A Viterbi detector receives the sequences from the channel and has a time-varying detector trellis structure derived from a run... | 07/16/1996 |
| 5508867 | Magnetoresistive sensor with flux keepered spin valve configuration A magnetoresistive (MR) sensing system comprises an MR sensor with a layered spin valve structure including thin first and second layers of ferromagnetic material separated by a thin layer of nonmagnetic metallic material. The magnetization direction of t... | 04/16/1996 |
| 5497384 | Permuted trellis codes for input restricted partial response channels Maximum likelihood detection of a trellis code using a Viterbi detector constructed from a time-varying trellis structure that is associated with a partial response channel and consists of connected trellises with periodically repeated patterns of nodes a... | 03/05/1996 |
| 5491698 | Setting optimal boundary thresholds in a decoder for coded signal processing channels To improve data detection reliability in a coded maximum likelihood signal processing channel, two counters count the number of times actual values of linear functions of digital sample values corresponding to one and another preselected data patterns are... | 02/13/1996 |
| 5485472 | Trellis codes with algebraic constraints for input restricted partial response channels A method for constructing trellis codes and an apparatus for providing trellis codes with increased minimum distance between output sequences of partial response channels with constrained inputs. A Viterbi detector expands a conventional trellis structure... | 01/16/1996 |
| 5458908 | Method of fabricating a magnetoresistive read transducer A magnetoresistive (MR) read transducer assembly having passive end regions separated by a central active region, and a method of fabricating it. Layers of a first biasing material and a nonmagnetic decoupling spacer material are deposited on a substrate,... | 10/17/1995 |
| 5444719 | Adjustable error-correction composite Reed-Solomon encoder/syndrome generator A composite encoder/syndrome generating circuit computes both check symbols and error syndromes using a single set of multiplier devices with varying tap weights having values that provide a maximum preselected error correction capability but is readily a... | 08/22/1995 |
| 5430745 | Prejudging current state in a decoder for coded signal processing channels Decoder for processing digital sample values corresponding to an incoming read signal representative of coded binary data. Functional expressions of digital sample values are precomputed for a preselected number of sample values ahead of a current sample ... | 07/04/1995 |
| 5428628 | Modular implementation for a parallelized key equation solver for linear algebraic codes Apparatus and method for implementing a parallelized algorithm for solving the key equation for the decoding of a linear algebraic code. Circuitry implements two computation sequences. One of these executes three multiplication operations and the other ex... | 06/27/1995 |
| 5423690 | Universal electrical power plug for multination use with self-setting contact pins An electrical plug selectively insertable into receptacles having different configurations of apertures for effecting selectable electrical connections. A plurality of contact prongs have extended positions in which they project exteriorly of a housing. E... | 06/13/1995 |
| 5386420 | Coding method for correction and detection of skewed transitions in parallel asynchronous communication systems A method and apparatus for encoding and decoding a (t1,t2)-skew-tolerant (ST) (t1 +s1,t2 +s2)-skew-detecting (SD) code, and for correcting and detecting skewed transitions in a parallel asy... | 01/31/1995 |
| 5384567 | Combination parallel/serial execution of sequential algorithm for data compression/decompression An apparatus and method for executing a sequential data compression algorithm that is especially suitable for use where data compression is required in a device (as distinguished from host) controller. A history buffer compresses an array of i identical h... | 01/24/1995 |
| 5373512 | Memory controller with parity generator for an I/O control unit A memory controller performs parity encoding on a plurality of data strings moving between a memory connected via a read path to a data bus connected to a corresponding plurality of storage devices. A write buffer has one input for receiving data for stor... | 12/13/1994 |
| 5362584 | Phase-shifting transparent lithographic mask for writing contiguous structures from noncontiguous mask areas A plurality of noncontiguous polygonal regions of phase-shifting material have edges spaced apart less than the distance at which images of said edges would separate. The edges of the regions of phase-shifting material have differing arbitrarily selectabl... | 11/08/1994 |
| 5343422 | Nonvolatile magnetoresistive storage device using spin valve effect A nonvolatile magnetoresistive (MR) storage device comprising a plurality of MR storage elements, each comprising a substrate and a multilayered structure including two thin film layers of ferromagnetic material separated by a thin layer of nonmagnetic me... | 08/30/1994 |
| 5327408 | Optical disk with sector servo patterns compensating for variations in pattern size and/or radial velocity An optical disk has groups of features (such as depressed areas) arranged in a preselected position sensing servo pattern, and a flat, non-grooved surface between a plurality of circumferentially spaced sectors. A single photodetector senses the change in... | 07/05/1994 |
| 5325253 | Stabilization of magnetoresistive transducer using canted exchange bias A magnetoresistive (MR) read transducer and method of fabricating same. A soft magnetic layer and an MR layer extend over a central active region and passive end regions of the transducer. A nonmagnetic spacer layer separates the soft magnetic film layer ... | 06/28/1994 |
| 5323278 | Low noise amplifier circuit for magnetoresistive sensors for fast read-write switching in low supply voltage applications A data storage system comprises magnetoresistive (MR) sensing elements for sensing data from a recording medium that is referenced to ground, and an amplifier circuit including a biasing stage, an amplifying stage, and a matching stage, each referenced to... | 06/21/1994 |
| 5309298 | Suppression of magnetic instability in inductive recording heads Circuitry for eliminating magnetic instability of an inductive magnetic transducer during sensing of data from a magnetic recording medium to prevent distortion of the readback signal by hysterically moving domain walls. An inductive sensing coil has an i... | 05/03/1994 |
| 5301304 | Emulating records in one record format in another record format Count, key, data (CKD) datas are stored on fixed block (FBA) disk recorders (DASD). A virtual track is created which emulates a physical CKD track such that the byte displacement of each CKD record on the virtual CKD track is the same as the byte displace... | 04/05/1994 |
| 5299208 | Enhanced decoding of interleaved error correcting codes Decoding power is enhanced by (1) flagging only those codewords where the ECC capability has been exceeded; (2) permitting codewords to be of any byte length (n) and codeword depth (λ) subject only to the requirement that n and λ be relatively prime; an... | 03/29/1994 |
| 5296975 | High-transition-rate, low-supply-voltage write driver circuitry for magnetic inductive write head Writing of data on a storage disk by an inductive magnetic transducer is modulated by write driver circuitry that includes a supply voltage as low as three volts provided by a source referenced to ground, and a bias current source connected to either the ... | 03/22/1994 |
| 5291500 | Eight-sample look-ahead for coded signal processing channels A signal processing channel and method are described for processing digital sample values corresponding to an incoming analog signal representative of coded binary data. An eight-sample look-ahead algorithm is used to precompute the values of functional e... | 03/01/1994 |
| 5287340 | Differential amplifier for optical detectors in an optical data storage system An optical data storage system including an amplifier which (i) provides a differential current input having a low impedance over the full range of frequencies for which amplification is required in an optical detector that includes a photodiode that sens... | 02/15/1994 |
| 5285454 | Method and apparatus for encoding and decoding unordered error correcting codes An unordered error correcting code is constructed by an encoding method and apparatus that accepts k bits of information and is capable of providing unordered ECC codewords. All pairs of these codewords are at least a distance d apart, where dࣙ(2t+1) an... | 02/08/1994 |
| 5282216 | High data rate decoding method for coding signal processing channels A method for processing, in a signal processing channel, digital values corresponding to a digitized incoming analog signal representative of coded binary data. A state-dependent sequence detection algorithm includes two groups of appropriate functional e... | 01/25/1994 |
| 5280533 | Coding method for skewed transition correction in parallel asynchronous communication systems An algorithm for a (t1, t2)-tolerant code, and a method and apparatus for decoding same, for tolerating and detecting skewed transitions in a parallel asynchronous communication system without acknowledgement. Transitions sent at the... | 01/18/1994 |
| 5280485 | Coding method for skewed transition detection in parallel asynchronous communication system An algorithm for a (t1,t2)-detecting code, and a method and apparatus for decoding same, for detecting skewed transitions in a parallel asynchronous communication system without acknowledgement. Transitions sent at the same time in a... | 01/18/1994 |
| 5270882 | Low-voltage, low-power amplifier for magnetoresistive sensor Low noise, low power, low voltage amplifier circuits with a single ended input having no common mode rejection for concurrently biasing and amplifying signals generated by magnetoresistive (MR) elements in a disk file. The amplifier circuits comprise a si... | 12/14/1993 |
| 5266850 | Clock delay trim adjustment with stopping feature for eliminating differential delay between clock signal and analog signal Method and circuitry for phase synchronizing an analog input signal with a clock signal by sensing clock delay error, adjusting in increments clock delay trim of a delay element that initially has an arbitrary delay setting, and stopping adjustment after ... | 11/30/1993 |
| 5266896 | Mechanical detection and imaging of magnetic resonance by magnetic moment modulation Methods and apparatus for detecting (and, if desired, imaging) the effects of magnetic resonance in a spin-containing material by measuring the magnetic force acting on a mechanical cantilever having a low damping coefficient due to modulation of the magn... | 11/30/1993 |
| 5257272 | Time-varying modulo N trellis codes for input restricted partial response channels A method and apparatus for generating high rate run length limited trellis codes and increasing minimum distance between output sequences of partial response channels with constrained channel inputs without requiring codes with spectral nulls. A Viterbi d... | 10/26/1993 |
| 5212572 | Optical data storage system with compact holographic polarization-sensing or reflectivity-sensing optical storage head An optical data storage system having a highly integrated optical storage head that (1) integrates the read, write and servo paths, (2) comprises a monolithic laser-detector storage array that is integrated on a single chip an, wherein laser-detector alig... | 05/18/1993 |
| 5208834 | Lexicographical encoding and decoding of state-dependent codes A method and apparatus for (1) reducing storage requirements by use of novel encoding/decoding lexicographically code and decode state-dependent codes, and (2) locally reordering coded subsequences to permit direct NRZ coding, which is especially desirabl... | 05/04/1993 |
| 5204789 | Low noise voltage-biasing amplifier for magnetoresistive element A circuit for concurrently producing low noise electrical output signals which are amplified representations of signals produced by a magnetoresistive (MR) element and protecting said element from electrical short circuits which can occur between said ele... | 04/20/1993 |
| 5195185 | Dynamic bus arbitration with concurrent same bus granting every cycle Apparatus and method for optimizing bus arbitration during direct memory access (DMA) data transfers across a nondedicated bus between a memory and/or a plurality of external devices each master having an arbitration priority. At least two nonoverlapping ... | 03/16/1993 |
| 5173694 | Binary data encoding and decoding using a rate 2/5 (2,18,2) code A rate 2/5 (2,18,2) code especially suitable for use with a resonant coil overwrite technique for magneto-optical recording. Serial binary input data is converted to serial binary code data that satisfies a (2,18,2) constraint and is reconverted to the se... | 12/22/1992 |
| 5151594 | Subpicosecond atomic and molecular motion detection and signal transmission by field emission A time-dependent record depicting the motion of one or more selected atoms with a time resolution equal to or shorter than 10-12 second is generated by applying an electric field to a field emission tip. Electrons emitted from the selected atom... | 09/29/1992 |
| 5144148 | Process for repositioning atoms on a surface using a scanning tunneling microscope A method and structure in which an adsorbate atom or molecule is repositioned on a substrate surface by moving the tip of an STM to a position adjacent to the atom to be moved and causing the atom to be attracted to the tip. While the atom remains bound t... | 09/01/1992 |
