Did You Know...
...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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 |
| 8166302 | Storage device with traceable watermarked content A storage device responds to a content request by watermarking the content and providing the watermarked content to the requester. The watermarked content uniquely identifies the storage device so that the storage device is traceable from the watermarked content. | 04/24/2012 |
| 8154238 | Accurate and versatile back EMF sensor A filter representing a complex impedance of a motor system based on a deviation between a first voltage driven by a command signal and a second voltage driven by the command signal can be dynamically adjusted. The motor system can be held in a steady state, elimina... | 04/10/2012 |
| 8144421 | Radial position seek tuning for acoustic performance Examples of the present invention relate to reduction in acoustic noise by tuning seek characteristics of a servo controller, depending on a radial position of a head relative to a disk. The servo controller can provide compensation for acoustic resonance modes.... | 03/27/2012 |
| 8134791 | Disc operation selection A method of identifying a string or chain of efficient or “good enough” disc operations for processing (a pseudo optimal chain) is provided. A “pseudo optimal chain” comprises a string or chain of operations that, while not necessarily the optimal string or ... | 03/13/2012 |
| 8065481 | RAID system and method compatible with improved drive select A RAID system is provided which can be implemented as a hardware RAID system while avoiding certain shortcomings of previous RAID systems. The RAID system makes it possible to avoid or reduce the number of buffers or processors and can take advantage of drive logic ... | 11/22/2011 |
| 8049985 | Variable spindle speed control for data storage devices In a particular embodiment, a system is disclosed that includes a solid-state data storage medium, a disc data storage medium, and a controller adapted to selectively adjust a spindle speed associated with the disc data storage medium and a buffer size associated wi... | 11/01/2011 |
| 8024490 | Method and system for generic data transfer interface According to one embodiment of the present invention, a data storage device comprises a generic host interface and a media controller. The host interface has a channel select bit encoder to assert one or more channel select bits to be decoded by the media controller... | 09/20/2011 |
| 8019925 | Methods and structure for dynamically mapped mass storage device Methods and structures for mapping of logical to physical block addresses within a disk drive to provide independence of the logical block size and the physical disk block size. The independence of the logical and physical block sizes enables numerous beneficial fea... | 09/13/2011 |
| 8000049 | Self-servo writing using reference patterns with timing correction Methods for writing servo fields on a rotatable data storage disk using reference patterns on the data storage disk include generating a clock signal, reading a reference pattern signal from a surface of the disk, generating a phase error signal in response to a pha... | 08/16/2011 |
| 7995304 | Circuits that use a postamble signal to determine phase and frequency errors in the acquisition of a preamble signal In a servo control loop, phase detection between a clock signal and servo burst fields on a movable storage media is carried out with compensation for phase error and frequency error in the timing of servo burst fields. ... | 08/09/2011 |
| 7994747 | Suppressing phased motor voltage transients on disconnect A clamping circuit is included in a phased motor control circuit, particularly on an electrical connection connected to at least one electrostatic discharge cell and/or the driver control electronics of the phased motor control circuit. The clamping circuit triggers... | 08/09/2011 |
| 7992029 | Electronic device with temporary flag for fail safe and power cycling An electronic device includes a flag circuit configured to generate a status flag indicating whether or not a power supply voltage to the electronic device has been cycled, and a controller configured to control an operation of the electronic device and to modify an... | 08/02/2011 |
| 7957084 | Extraction of transducer position information from bit patterned magnetic media Extracting transducer position information from bit patterned magnetic media includes providing a magnetic storage medium having at least one data array with multiple discrete and separated recording bits and providing the transducer adjacent the data array. A readb... | 06/07/2011 |
| 7936532 | Selectively inhibiting transducer output responsive to detected jerk Various embodiments relate to selectively inhibiting output from a transducer in response to the rate of change of acceleration that is experienced by the transducer. The rate of change of an acceleration signal, which is indicative of transducer's acceleration, is ... | 05/03/2011 |
| 7924178 | System and method for lossless data compression An embodiment of a method for compressing data includes variable length coding one or more values of control codes generated from dictionary coding the data, wherein the control codes comprise literals and indices, wherein each index comprises a length value and a p... | 04/12/2011 |
| 7920354 | Phase servo patterns for bit patterned media A recordable medium according to some embodiments includes a servo control field having a bit patterned media (BPM) pattern. The pattern includes a plurality of isolated magnetic islands or dots arranged in a down-track orientation and in a cross-track orientation. ... | 04/05/2011 |
| 7916421 | Methods and structure for recovery of write fault errors in a dynamically mapped mass storage device Methods and structures for recovering from an off-track position error in a dynamically mapped storage device. In a dynamically mapped storage device data is dynamically mapped to a physical location on the recordable media. Thus, when a write fault occurs, such as ... | 03/29/2011 |
| 7890314 | Method for modeling performance of embedded processors having combined cache and memory hierarchy A method allocating firmware objects between different types of memory in a product model based on a frequency of access of each firmware object in trace data. The allocated firmware objects and trace data are used to simulate the performance of the product model. M... | 02/15/2011 |
| 7880992 | Phase detector that compensates for frequency variation induced bias in phases of servo burst fields In a servo control loop, phase detection between a clock signal and servo burst fields on a movable storage media is carried out with compensation for the effects of frequency variation in the timing of servo burst fields. ... | 02/01/2011 |
| 7855848 | Head-disk interference detection using spin motor current Detection of head disk interference is provided by monitoring a hard disk drive characteristic related to disk rotation rate. A number of characteristics can indicate HDI. These include the magnitude of decreases in rotation rate, changes in the time-derivative (tim... | 12/21/2010 |
| 7826163 | Large shock particle mitigation A system is capable of detecting a “large” shock. In contrast to just any shock, a large shock exceeds some threshold of magnitude or duration and may generate particles and/or the deposit of particles on a recording head, which can result in write errors. Respo... | 11/02/2010 |
| 7823290 | Method of forming a hub for use in a disk drive motor Methods of machining a single piece hub with integral upper and lower female cones includes providing a single piece hub with upper and lower conical voids having respective narrow ends proximal each other and respective wide ends distal each other. Surfaces of the ... | 11/02/2010 |
| 7802142 | High speed serial trace protocol for device debug Tracing of test information from a hardware device for debugging is formatted for transmission via a high-speed serial protocol. Data from various components in the hardware device is transmitted to an external test board using high speed serial ports. The number of... | 09/21/2010 |
| 7783830 | Solid state device pattern for non-solid state storage media A method and apparatus for receiving data at a non-solid state storage device, which includes a store cache and a storage medium. The received data is written to the store cache and transferred from the store cache to the storage medium. In response to receiving a s... | 08/24/2010 |
| 7752491 | Methods and structure for on-the-fly head depopulation in a dynamically mapped mass storage device Methods and structures for providing on-the-fly head depopulation in a dynamically mapped storage device. In a dynamically mapped storage device in which all user supplied logical blocks are dynamically mapped by the storage device controller to physical disk blocks... | 07/06/2010 |
| 7734146 | Video data reduction in MPEG bit stream Video data in an encoded frame is reduced by adjusting orthogonal transform coefficients in the encoded frame during trick play operation such as fast forward or fast reverse. The orthogonal transform coefficients are adjusted by selecting essential orthogonal trans... | 06/08/2010 |
| 7729076 | Angularly spaced spiral erase for media Embodiments of the present invention allow for media erasure. Various embodiments allow for controlling an actuator based on feedback signal measurements and disk phase to seek a head across a surface of a disk systematically for an erasure operation. Also, in vario... | 06/01/2010 |
| 7719787 | Phase locked anti- notch filter in a servo control loop An anti-notch filter in a servo control loop is phase locked to a nonrepeatable runout component of a servo control loop signal. The phase locked anti-notch filter may thereby more effectively track time varying characteristics of the nonrepeatable runout component ... | 05/18/2010 |
| 7694071 | Disk drives and methods allowing configurable zoning A disk drive capable of being configured into a plurality of data storage zones, wherein some of the zones have different performance characteristics than other zones; a method for performing such a zoning configuration; and, a host device utilizing such a disk driv... | 04/06/2010 |
| 7675702 | Reduced convolution for repetitive disturbance rejection Methods according to some embodiments include writing servo patterns on a data storage medium including a plurality of timing patterns in response to phase correction values generated using a phase correction value (PCV) kernel having a length that is less than the ... | 03/09/2010 |
| 7667922 | Estimation of bias force for data tracking in a disk drive Bias force changes in a disk drive, including transient bias changes, are predicted and/or estimated. Bias compensation or change in bias compensation is calculated based on drive operating parameters such as seek length. Calculation can correspond to a modeled rela... | 02/23/2010 |
| 7667919 | Systems and methods for identifying pushpin resonance mode for a servo track writer A system for generating resonance mode information associated with a servo track writer system comprising a drive VCM, a drive arm assembly, an external VCM, an external arm assembly, and a mechanical connection between the external arm assembly and the drive arm as... | 02/23/2010 |
| 7653847 | Methods and structure for field flawscan in a dynamically mapped mass storage device Methods and structures for performing field flawscan to reduce manufacturing costs of a dynamic mapped storage device. In a dynamic mapped storage device in which all user supplied logical blocks are dynamically mapped by the storage device controller to physical di... | 01/26/2010 |
| 7643239 | Controller selection to reduce written-in run-out Embodiments of the present invention reduce the written-in run-out in servo data written to a storage medium. A set of servo controllers are evaluated and the controller having the best expected performance among the set is selected and employed. One embodiment of t... | 01/05/2010 |
| 7633704 | Regulating tuning rate of adaptive filter coefficients for feed-forward disturbance rejection in a servo control loop In a servo control loop, the rate of change of filter coefficients used by an adaptive filter to counteract external disturbances to head position is regulated in response to a characteristic of an acceleration signal. Regulating the rate of change of the filter coe... | 12/15/2009 |
| 7633696 | Fly height calibration for read/write heads A fly height controller that controls fly height of a read/write head relative to a rotating data storage disk is calibrated. A heater signal is applied to a heater element to heat the head. The level of a write current that is conducted through the head is increase... | 12/15/2009 |
| 7630166 | Control flow instability to reduce disk flutter and half frequency whirl To reduce the whirling air vortices which are normally formed at the disc tip, the outer edge of the disc surface may be gradually thinned down to a sharp tip. An alternative approach, the disc tip is gradually reduced in width and rounded at its outer edge. A flow ... | 12/08/2009 |
| 7626783 | Lubricated limiter for fluid dynamic bearing motor In one example, a FDB motor having a top-cover attached, EM biased bearing system is provided. The motor includes a shaft and rotor disposed for relative rotation, and an axial limiter for restricting axial movement of the rotor with respect to the shaft, wherein th... | 12/01/2009 |
| 7624189 | Transferring data between computers for collaboration or remote storage Remotely communicating data between computers or devices across a wide area network for purposes of redundancy or collaboration. A service brokers the transfer of data between an initiating computer and a destination device, thereby establishing a peer-to-peer archi... | 11/24/2009 |
| 7623427 | Surface inspection by amplitude modulated specular light detection An apparatus for detecting defects on a disk surface includes a light source that generates a light beam and a beamsplitter that splits the light beam into a first light beam portion and a second light beam portion. The first light beam portion illuminates the surfa... | 11/24/2009 |
