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Class Information
Number: 360/43
Name: Dynamic magnetic information storage or retrieval > General processing of a digital signal > In specific code or form > Multi-frequency

Patents under this class:
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Patent Number Title Of Patent Date Issued
8693121 Oversampling storage system captured waveform Apr. 8, 2014
8687303 Shingle-written magnetic recording (SMR) device with hybrid E-region Apr. 1, 2014
8681443 Shingle-written magnetic recording (SMR) device with hybrid E-region Mar. 25, 2014
8654467 Disk drive increasing bandwidth of cutoff filter while reading servo sector preamble Feb. 18, 2014
8522067 Variable latency interface for read/write channels Aug. 27, 2013
8184390 Data pattern dependent amplitude adjustment May. 22, 2012
8139305 Systems and methods for timing and gain acquisition Mar. 20, 2012
7742250 Spectral analysis of a position error signal Jun. 22, 2010
7302749 Method of making a two-layer lap winding for a multiphase electrical machine Dec. 4, 2007
6894855 Magnetic disk drive including read channel for processing differentiated read signal May. 17, 2005
6647445 Data transmission by an alternating frequency analog signal Nov. 11, 2003
6476743 Magnetic stripe reader Nov. 5, 2002
6124993 Digital servo track format with leading and trailing identifiers Sep. 26, 2000
6021281 Apparatus and method for recording information on a film Feb. 1, 2000
5623376 Digital information restoring device including period detector Apr. 22, 1997
5466920 Real time decoding for card transaction terminal Nov. 14, 1995
5466920 Real time decoding for card transaction terminal Nov. 14, 1995
5453603 Method and apparatus for decoding bi-phase encoded data Sep. 26, 1995
5396370 Process for evaluating binary data of a magnetic storage card Mar. 7, 1995
5305156 Digital data storage apparatus comprising circuit for reducing read errors Apr. 19, 1994
5229894 Method and apparatus for reading and decoding information using a magnetoresistive sensor Jul. 20, 1993
5130863 Digital signal recording apparatus for recording plural kinds of digital information signals having different respective bit rates Jul. 14, 1992
5128809 Coherent multi-frequency synthesis Jul. 7, 1992
5003408 Method and apparatus for removing data stream variations Mar. 26, 1991
4987500 Self compensating high density data recording and detection scheme Jan. 22, 1991
4956831 Low acoustic noise head actuator Sep. 11, 1990
4876615 Data decoding system Oct. 24, 1989
4837782 CMI decoder Jun. 6, 1989
4821293 Digital phase locked loop circuit Apr. 11, 1989
4809304 Method of extracting a synchronous clock signal from a single- or double-density coded signal, and apparatus for performing the method Feb. 28, 1989
4809301 Detection apparatus for bi-phase signals Feb. 28, 1989
4714968 Digital apparatus for data recovery system Dec. 22, 1987
4672483 Information recording and reading apparatus having recording error checking circuit Jun. 9, 1987
4651328 Arrangement for supervising a CMI-code converter Mar. 17, 1987
4628372 Method and apparatus for identifying recorded information segments on a record medium Dec. 9, 1986
4553177 Method and apparatus for recording data Nov. 12, 1985
4532559 Apparatus for decoding phase encoded data Jul. 30, 1985
4503472 Bipolar time modulated encoder/decoder system Mar. 5, 1985
4481549 MFM data encoder with write precompensation Nov. 6, 1984
4473851 Analog magnetic recording system for binary signals Sep. 25, 1984
4470081 Controlled return to A.C. digital magnetic and reproducing system Sep. 4, 1984
4462051 Demodulator for an asynchronous binary signal Jul. 24, 1984
4459623 Method and apparatus for recovering NRZ information from MFM data Jul. 10, 1984
4453157 Bi-phase space code data signal reproducing circuit Jun. 5, 1984
4441193 Frequency-encoding circuit for reducing distortion Apr. 3, 1984
4426667 Pulse width modulation system Jan. 17, 1984
4393458 Data recovery method and apparatus using variable window Jul. 12, 1983
4383281 Method and arrangement for magnetic digital recording with high frequency biasing with suppression of DC components in the recording signals May. 10, 1983
4376958 Modified frequency modulation Mar. 15, 1983
4370747 Data transmission Jan. 25, 1983

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