Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 7724458 | Hard disk drive with selectable reading and writing to/from different platter surfaces This invention protects the data on the hard disk from viruses and hackers by making it possible to turn off any head whether it is a read head or a write head of any arm of the hard disk by providing switches, so when we surf the Internet we turn off the read/write... | 05/25/2010 |
| 7595951 | Head-specific standby modes for disk drive preamplifiers and the like A (e.g., hard-disk drive (HD)) system supports reader standby mode and/or writer standby mode. For reader standby mode, reader circuitry in the system's preamplifier is transitioned to a low-power mode during write operations. To provide quick transition from write ... | 09/29/2009 |
| 7380134 | Information recording/reproducing apparatus and method of executing encryption processing An information recording apparatus has a content encryption section which encrypts content information with an encryption key and outputs encrypted content information, a control section which identifies an already moved area in the content information and generates... | 05/27/2008 |
| 7372653 | Degauss waveform generator for perpendicular recording write head Embodiments of the invention provide a hard disk drive that is capable of performing degaussing promptly and properly and a recording method for use with such a hard disk drive. A hard disk drive according to one embodiment of the present invention comprises a curre... | 05/13/2008 |
| 7330644 | Recording device A camera apparatus includes a single release switch member. The single release switch member is for instructing an image capture operation, and selects one of a first operative state and a second operative state. The first operative state is selected when the single... | 02/12/2008 |
| 7325763 | Magnetic tape guiding system guide roller with single flange oriented at lower debris tape edge Magnetic tape guiding system takes advantage of characteristics of slit magnetic tape wherein one of the two tape edges has a higher tendency to shed tape debris than the other, and the slit tape is consistently loaded into tape cartridges in the same direction. A t... | 02/05/2008 |
| 7326869 | Tactile feedback plunger switch A tactile feedback switching mechanism having a plurality of switching states. The tactile feedback switching mechanism includes a plunger switch having a plunger. When the plunger is displaced a given distance the switch changes state. A covering lies at least over... | 02/05/2008 |
| 7310823 | Digital information recording apparatus and outputting apparatus A digital information recording apparatus includes multiple recording circuits for making multiple copies. The apparatus limits the number of copies, however, in accordance with copy information provided within the digital information itself. When the number of copi... | 12/18/2007 |
| 7270554 | Audio jack with plug or head set identification circuit A jack (90) typically mounted in an aircraft seat is adapted for use with a variety of headset types. A jack has sockets (92, 93, 94) accepting any of several different types of plugs associated with different types of noise cancellation headsets or av... | 09/18/2007 |
| 7245448 | Information recording apparatus and data writing control device therefor A plurality of recording media combined integrally having a plurality of recording surfaces; and a plurality sets of reading heads and writing heads, combined integrally, provided for the respective ones of the plurality of recording surfaces, are provided. Upon wri... | 07/17/2007 |
| 7231136 | Video signal recording and reproducing apparatus The video signal recording and reproducing apparatus of the invention includes: a receiving section for receiving a television signal; an image compression section for compressing an amount of information per unit time of the received continuous video signal; a writ... | 06/12/2007 |
| 7177105 | Disk synchronous write An apparatus, method, and system for writing data to a hard disk drive synchronous with an apparent disk speed. The apparatus, method, and system has a phase-locked loop (PLL) to generate am output clock signal, wherein a clock interpolator responsive to phase rotat... | 02/13/2007 |
| 7114048 | Recording apparatus, recording method, storage medium, program and communication apparatus The present invention relates to a recording apparatus and method as well as a communication apparatus suitable for use where stored contents data of, for example, music tunes are supplied to a semiconductor memory or a portable device. At step S391, a C IN/C... | 09/26/2006 |
| 7106534 | Method for compensating timing to start data recording and magnetic disk device using same Head-to-head variations in the head gap distance between write and read heads is compensated by measuring the head gap distance in each head by writing and reading a predetermined unique pattern, and compensating the timing to start the data writing by changing it i... | 09/12/2006 |
| 7106536 | Write head demagnetizer A demagnetizer for an inductive load having a driver circuit including at least one transistor and a ramp-down voltage source switchably connected to the driver circuit, so that when the ramp-down voltage source is connected to the transistor, it drives the voltage ... | 09/12/2006 |
| 7099101 | Apparatus, system, and method for determining contact with a magnetic head in a tape drive An apparatus, system, and method are disclosed for determining brush contact with a magnetic head. A digitally generated signal is provided in a system and a first gain constant is adjusted without the brush in contact with the magnetic head until the signal achieve... | 08/29/2006 |
| 7092187 | Magnetic recording and reproducing apparatus and method and thin film magnetic head used therein The present invention provides a magnetic recording and reproducing apparatus, a magnetic recording and reproducing method, and a thin film magnetic head that enable a good contact between elements and a recording medium with a reduced track pitch even if the number... | 08/15/2006 |
| 7079345 | Demagnetization of magnetic media for data storage device using gradually reduced magnetic field Demagnetizing magnetic media for recording data in a data storage device includes placing the magnetic media in a magnetic field at a first strength, and gradually reducing the magnetic field to a second strength to essentially eliminate net magnetization in the mag... | 07/18/2006 |
| 7065219 | Acoustic apparatus and headphone A headphone section 10 having microphone elements 14L, 14R for detecting a sound around the user and signal acoustic transducing elements 15L, 15R which function as a sound source for canceling the sound around the user housed in t... | 06/20/2006 |
| 7042665 | Apparatus and method for reproducing recorded signal In an apparatus for reproducing a recorded signal and the like of this invention, two reproducing heads are provided for a single track with their set positions being deviated in the track width direction. A signal selecting unit discriminates a reproducing head who... | 05/09/2006 |
| 7023635 | Recording/reproducing apparatus A recording/reproducing apparatus capable of switching over among a plurality of heads with high precision, wherein the apparatus is provided with: a recording/reproducing unit for recording/reproducing signals onto/from a recording medium with a plurality of heads;... | 04/04/2006 |
| 7015747 | Device for controlling a frequency response by scaling an impedance Provided is a device for controlling a frequency response by scaling an impedance. The device includes a filter and a duty ratio controller. The filter generates an output signal after removing a frequency from an input signal, and comprises a first impedance compon... | 03/21/2006 |
| 7012775 | Writer for head positioning information over recording medium A writer for head positioning information, or a so-called servo track writer allows the read gap to follow a track which has been established on a recording medium or disk. As long as the read gap keeps following the existing track, the write gap is allowed to move ... | 03/14/2006 |
| 6980385 | Apparatus for information recording and reproducing In order to generate a sampling clock having a higher accuracy, a synchronous signal generating circuit is provided with a phase error detector, detecting a phase error of a read out signal digitized on the basis of FDTS algorithm, and a VCO, controlling an oscillat... | 12/27/2005 |
| 6975110 | Magnetic sensor utilizing magnetoresistance effect, method for driving magnetic sensor utilizing magnetoresistance effect and magnetic recording systems The invention relates to a magnetic sensor utilizing a magnetoresistance effect, a method for driving a magnetic sensor utilizing a magnetoresistance effect and a magnetic recording system, and an object of the invention is to overcome the restriction in the level o... | 12/13/2005 |
| 6954325 | Method and disc drive for writing servo wedges A method and disc drive are disclosed that write servo wedges to a plurality of tracks of a disc. A head having a read element offset from a write element reads a servo wedge on a first track as a propagation guide and writes two or more servo wedges to be used as a... | 10/11/2005 |
| 6954321 | Method and apparatus for improved read-to-write transition time for a magneto-resistive head Magneto-Resistive (MR) head read/write channel (400) provides timer (421), detector (433) and amplifier (432) to reduce the amount of time required to transition from read mode to write mode. Controller (410) issues the write comma... | 10/11/2005 |
| 6922303 | Reaction mass dual-stage actuator (DSA) and sensor A hard disk drive that has a reaction mass and a transducer that can be used to move and/or sense the acceleration of an actuator arm of the drive. The transducer is coupled to a disk controller that can provide output signals which induce a movement of the reaction... | 07/26/2005 |
| 6903608 | Power level controlling of first amplification stage for an integrated RF power amplifier A power amplifier circuit is disclosed having a first amplification stage and a second amplification stage. The first amplification stage is biased using a controllable current source that provides a variable bias current thereto. A control circuit is provided for c... | 06/07/2005 |
| 6882492 | Cassette type audio data or signal recording and reproducing apparatus A cassette type audio signal recording apparatus comprising a recording detection sensor for generating a predetermined detection output as a recording button is pressed, a recording head for converting the applied magnetic signal to an electric audio signal and out... | 04/19/2005 |
| 6791776 | Apparatus for information recording and reproducing In order to generate a sampling clock having a higher accuracy, a synchronous signal generating circuit is provided with a phase error detector, detecting a phase error of a read out signal digitized on the basis of FDTS algorithm, and a VCO, controlling an oscillat... | 09/14/2004 |
| 6717761 | Recording/reproducing apparatus A recording/reproducing apparatus capable of switching over among a plurality of heads with high precision, wherein the apparatus is provided with: a recording/reproducing unit for recording/reproducing signals onto/from a recording medium with a plurality of heads;... | 04/06/2004 |
| 6639747 | Signal recording and reproducing method and signal recording and reproducing unit The present invention relates to a signal recording and reproducing method used for video tape recorder. An erasing position precedes a recording position and a reproducing position precedes the erasing position. By using a period when reproducing does no... | 10/28/2003 |
| 6628467 | Input/output multiplex system for a read/write channel in a disk drive This invention provides a read/write channel with a multiplex input/output system for a disk drive, which may have one or more magnetic disks, one or more read/write heads, and a read/write channel. The read/write channel may comprise a multiplex input/ou... | 09/30/2003 |
| 6577464 | Magnetic recording device having first actuator for coarse adjustment and second actuator for fine adjustment In a magnetic recording device, a control element placed on a flexible wiring board between a control device and first actuators includes a plurality of actuator-driving-signal connecting terminals connected to a plurality of second actuators, an actuator... | 06/10/2003 |
| 6535953 | Magnetic disk, method of accessing magnetic disk device, and recording medium storing disk access control program for magnetic disk device A magnetic disc apparatus according to the present invention is one which is provided with a host interface unit 2 which controls the interface connected to a host apparatus 1, a command administrating unit 3, a position information administrating unit 4,... | 03/18/2003 |
| 6525895 | Reproducing apparatus A reproducing apparatus for reproducing an information signal recorded on a recording medium is provided with a reproducing part arranged to reproduce the information signal recorded on the recording medium and to output the reproduced information signal,... | 02/25/2003 |
| 6522492 | Write to read switching time trim circuit An offset circuit to correct an offset between differential signals includes a read circuit to read the differential signals, a circuit to measure the offset of the differential signals, and a programmable trim circuit to compensate for the offset of said... | 02/18/2003 |
| 6473256 | Method and apparatus for a 200 NS write to read switch time circuit The present invention includes a circuit which can achieve a 200 nano second write to read time. The present invention eliminates a switch in the RMR measurement circuit.... | 10/29/2002 |
| 6445527 | Method and apparatus to reduce magneto-resistive drive electromigration and improve drive yields Multi-head disk drive system measures head resistances and selects lowest-resistance heads for track-servo operation during sleep mode, thereby substantially prolonging EM lifetime, improving field failure rate, unit production costs, and drive performanc... | 09/03/2002 |
