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Patent No. 5823572

Self Defense Weapon With Memo

A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.

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Assignee: Western Digital Technologies, Inc.


Location: Lake Forest, CA
No. of patents: 539

1                      
NumberTitleIssue Date
7900037Disk drive maintaining multiple logs to expedite boot operation for a host computer
A disk drive is disclosed wherein during a first boot operation, first boot data is transmitted from a first plurality of data sectors to a host, and a first log identifying the first plurality of data sectors is maintained. During a second boot operation, second bo...
03/01/2011
7898756Disk drive adapting target values of a sequence detector relative to bit error rate of the sequence detector
A disk drive is disclosed comprising a disk and a head actuated radially over the disk, wherein the head generates a read signal. A sampling device samples the read signal to generate a sequence of read signal samples when reading a training data sequence recorded o...
03/01/2011
7876523Disk drive initializing position feedforward compensation with velocity feedforward compensation
A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of spiral tracks, wherein each spiral track comprises a high frequency signal interrupted by a sync mark at a sync mark interval. The head is positioned over the disk and used to...
01/25/2011
7876522Disk drive updating estimate of voice coil resistance to account for resistance change prior to unload operation
A disk drive is disclosed comprising a disk and a head actuated over the disk by a voice coil motor (VCM) comprising a voice coil, wherein the VCM is controlled by a VCM control loop comprising an IR voltage detector. The IR voltage detector is updated by measuring ...
01/25/2011
7874424Disk pack balancing station
A method of balancing a disk pack assembly is disclosed. The disk pack assembly comprises a plurality of components including a plurality of disks coupled to a hub of a spindle motor with at least one disk spacer between the disks. The method comprises the steps of ...
01/25/2011
7872822Disk drive refreshing zones based on serpentine access of disk surfaces
A disk drive is disclosed including a first disk surface comprising a plurality of data tracks, wherein each data track comprises a first plurality of data sectors, and a second disk surface comprising a plurality of data tracks, wherein each data track comprises a ...
01/18/2011
7869183Static electricity monitoring device comprising a first footpad electrically insulated from a second footpad
A static electricity monitoring device is disclosed for monitoring a user wearing a static control garment. The garment comprises a first bootie and a second bootie. The monitoring device comprises a first footpad for interfacing with the first bootie of the garment...
01/11/2011
7869182Monitoring device for use with an insulated dual portion garment
A method is disclosed for monitoring a user wearing a static electricity garment. The garment comprises a first conductive upper body portion including a first electrical interface, a second conductive upper body portion including a second electrical interface, a fi...
01/11/2011
7869155Ramp detection during servo-writing of a disk for a disk drive
A servo writer to detect a ramp is disclosed. The servo writer includes a head positioner to position a head of an actuator arm of a head disk assembly relative to a disk and a controller to: control the head positioner to move the head of the actuator arm toward a ...
01/11/2011
7864488Suspension assembly including a dimple that contacts a flexure tongue dielectric layer through a hole in a flexure tongue structural layer
A suspension assembly includes a load beam having a protruding dimple and a laminate flexure. The laminate flexure includes a structural layer that is attached to the load beam, and a dielectric layer. The laminate flexure includes a flexure tongue for mounting a he...
01/04/2011
7864482Disk drive calibrating VCM notch filter by increasing the width and/or the depth of the notch
A disk drive is disclosed comprising a disk, a head, a voice coil motor (VCM) for actuating the head over the disk, and control circuitry comprising a notch filter for generating a VCM control signal, wherein a notch of the notch filter comprises a frequency, a widt...
01/04/2011
7864481Evaluating distribution of peak signals representing reference track crossings to compensate for thermal expansion when writing spiral tracks to a disk
A method of writing a spiral track on a disk of a disk drive is disclosed. A plurality of reference tracks are written on the disk. A head is moved over the reference tracks to generate a read signal comprising a plurality of peak signals, wherein each peak signal c...
01/04/2011
7863889Component receptacle to segregate components
A component receptacle for coupling to a component tester that tests a component is disclosed. The component receptacle includes a plurality of trays mounted in a housing for receiving components, a tray access control system configured to control access to at least...
01/04/2011
7859782Selecting highest reliability sync mark in a sync mark window of a spiral servo track crossing
A method is disclosed for demodulating a spiral servo track recorded on a disk of a disk drive. The spiral servo track comprises a high frequency signal interrupted by a sync mark at a sync mark interval. A demodulation window is enabled relative to a spiral servo t...
12/28/2010
7852601Radial top cover gasket for disk drives
A radial top cover gasket is used for sealing a disk drive assembly. In one embodiment, a disk drive assembly includes a baseplate having a sidewall disposed about a periphery of the baseplate. The disk drive further includes a top cover that is disposed within the ...
12/14/2010
7852596Disk drive returning dummy data to a host when reading an unwritten data sector
A disk drive is disclosed comprising a disk and a head actuated over the disk. The disk comprises a plurality of tracks, wherein each track comprises a plurality of data sectors. A read command is received from a host to read data from a target data sector. When it ...
12/14/2010
7852592Spiral slope approximation of spiral patterns written to a disk of a disk drive
A disk drive that approximates spiral slope in spiral patterns is disclosed. The disk drive includes a disk having at least one spiral pattern that extends radially across the disk, a head to read a portion of the at least one spiral pattern, and a processor to appr...
12/14/2010
7852588Disk drive adjusting gain of shock detector relative to resonant frequency amplitude
A disk drive is disclosed comprising a disk, a head actuated radially over the disk, and control circuitry including a shock detector. The control circuitry is operable to detect a resonant frequency amplitude (RFA) of the shock detector, adjust the shock detector i...
12/14/2010
7843662Servoing on concentric servo sectors of a first disk surface to write a spiral servo track to a second disk surface
A disk drive is disclosed comprising a first disk surface and a second disk surface, wherein the first disk surface comprises a plurality of concentric servo sectors extending across substantially an entire radius of the first disk surface. The concentric servo sect...
11/30/2010
7843660Disk drive adjusting erasure window based on a number of non-read data sectors during a retry operation
A disk drive is disclosed comprising a disk having a plurality of data tracks, wherein each data track comprises a plurality of data sectors. A head is actuated radially over the disk in order to read one of the data sectors from a target data track on the disk. The...
11/30/2010
7839600Disk drive employing data-based basis function expansion for tuning seek servo loop
A method of tuning a seek operation of a disk drive is disclosed, the disk drive comprising a disk, an actuator arm, a head coupled to a distal end of the actuator arm, a voice coil motor (VCM) for rotating the actuator arm about a pivot, and a closed loop servo sys...
11/23/2010
7839595Feed forward compensation for fly height control in a disk drive
A method of selecting a dynamic fly height (DFH) control setting for a head in a disk drive is disclosed. The head is servoed over a disk, and a fly height measurement is generated for the head. A frequency component is extracted from the fly height measurement, and...
11/23/2010
7839591Disk drive comprising index spiral track identified by change in sync mark
A disk drive is disclosed comprising a disk and a head actuated over the disk. The disk comprises a plurality of spiral tracks, wherein each spiral track comprises a high frequency signal interrupted by a sync mark at a sync mark interval. A first spiral track compr...
11/23/2010
7839588Method of alternating track write for defect identification
Defects are identified in a disk drive by first writing a pattern of tracks to a disk surface in the disk drive, the pattern of tracks including written tracks alternating with unwritten tracks. The written tracks of the pattern of tracks are read, and a defect in a...
11/23/2010
7827320Serial ATA device implementing intra-command processing by detecting XRDY primitive while in the XRDY state
A Serial Advanced Technology Attachment (SATA) device for communicating with a host is disclosed. The SATA device comprises control circuitry which enters a XRDY state in preparation for sending data to the host, receives a first XRDY from the host while in the XRDY...
11/02/2010
7826177Flexure having arms with reduced centroid offset for supporting a head in a disk drive
A flexure for supporting a head in a disk drive includes a tongue including a head mounting surface for attaching the head. The flexure further includes a first arm on a first side of the tongue. The first arm includes a structural material and has a first cross-sec...
11/02/2010
7804657Setting an operating bias current for a magnetoresistive head using ratio of target voltage and measured voltage
A method is disclosed for setting an operating bias current for a magnetoresistive (MR) element. A bias current is applied to the MR element, and a voltage across the MR element is measured corresponding to the bias current. The bias current is then adjusted in resp...
09/28/2010
7800857Disk drive calibrating voice coil resistance for velocity control of voice coil motor
A disk drive is disclosed comprising an IR voltage detector operable to detect a resistive voltage due to a resistance of a voice coil in a voice coil motor, and a BEMF detector operable to subtract the resistive voltage from the voice coil voltage to generate a BEM...
09/21/2010
7800856Disk drive flushing write cache to a nearest set of reserved tracks during a power failure
A disk drive is disclosed comprising a head actuated over a disk having a plurality of data tracks and a first and second set of reserved tracks, wherein the first set of reserved tracks are located at a first radial location, and the second set of reserved tracks a...
09/21/2010
7800853Correcting servo sectors in a disk drive
A disk drive is disclosed comprising a disk having a plurality of data tracks defined by a plurality of servo sectors, wherein each servo sector comprises a Gray coded address representing at least part of a track address. The disk drive further comprises a head act...
09/21/2010
7788404Access and control system for network-enabled devices
A publicly addressable control infrastructure includes a plurality of connection servers and a load balancing server. The load balancing server assigns connection servers to particular communication sessions based on a number of variables. A computer at a private ad...
08/31/2010
D621282Packaging sleeve
08/10/2010
7768776Disk drive enclosure with a sliding door having tabs with adjacent through-slots
An information storage device includes a housing having a cavity, and a sliding door partially covering the cavity. The housing has a first groove and a second groove on opposite sides of the cavity. The sliding door includes first and second edges adjacent the firs...
08/03/2010
7760461Disk drive employing coarse position feedback from mechanical position sensor to improve format efficiency
A disk drive is disclosed including a disk having a plurality of servo tracks. The servo tracks are banded together to form a plurality of servo track bands, and each servo sector comprises a fine track address that identifies one of the servo tracks. The disk drive...
07/20/2010
7760458Disk drive adjusting head bias during servo synchronization to compensate for over/under sensitivity
A disk drive is disclosed comprising a disk including a plurality of servo sectors, a head actuated over the disk, the head for generating a read signal, and a gain control circuit for adjusting a gain of the read signal in response to a gain setting. A bias setting...
07/20/2010
7751145Disk drive with air channel
A disk drive baseplate includes a raised major surface oriented essentially parallel to the disk, a recessed major surface, and a boundary contour between the raised major surface and the recessed major surface. In one embodiment, the baseplate further includes an a...
07/06/2010
7746595Disk drive comprising slanted line servo bursts having reverse polarity segments
A disk drive is disclosed comprising a disk having servo data defining a plurality of servo tracks. The servo data comprises a preamble, and a plurality of slanted line servo bursts recorded at a tilt angle with respect to the preamble. At least one of the slanted l...
06/29/2010
7746594Disk drive comprising slanted line servo burst sets offset radially
A disk drive is disclosed comprising a disk having servo data defining a plurality of servo tracks. The servo data comprises a preamble, and a plurality of slanted line servo bursts recorded at a tilt angle with respect to the preamble. The slanted line servo bursts...
06/29/2010
7746592Disk drive detecting defective spiral servo track
A disk drive is disclosed comprising a disk and a head actuated over the disk, wherein the disk comprises a plurality of spiral tracks, each comprising a high frequency signal interrupted by a sync mark at a sync mark interval. The head is used to read a spiral trac...
06/29/2010
7743486Method for assembling a head stack assembly with a disk drive base utilizing a tooling mandrel
A method for assembling a head stack assembly with a disk drive base utilizing a tooling mandrel is described. The head stack assembly includes a pivot bearing cartridge with a shaft and a sleeve. The shaft includes a shaft first end with an engagement feature. The ...
06/29/2010
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