LexDanaLexDanabeta
Inventor

Richard M. Ehrlich

Inventor
Saratoga, CA, US

Overview

101→
Patents
1994–2021
Patent span
Physics
Primary field (CPC G)

Patents· 101 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer76%
G06FElectric digital data processing15%
Y02DClimate change mitigation technologies in information and communication technologies [ict], i.e. information and communication technologies aiming at the reduction of their own energy use3%
G01DMeasuring not specially adapted for a specific variable2%
H04LTransmission of digital information, e.g. telegraphic communication2%
G03HHolographic processes or apparatus1%
G11CStatic stores1%
H02JElectric power networks1%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications1%
PatentTitleYear
11,062,733Disk drive with efficient handling of off-track events during sequential write202111,036,436Seek scheduling in a split actuator drive202110,936,498Shingled magnetic recording drive that updates media cache data in-place202110,777,218Disk-drive with efficient command reordering202010,770,110Disk drive with efficient handling of off-track events during sequential write202010,685,678Data center dual stage drive with data striping202010,678,442Disk drive that efficiently handles random mixed-R/W command-streams202010,565,119SMR drive that maintains physical locations of bands via flush/copy operations202010,431,257Data center dual stage drive with data striping201910,418,053Disk-drive with efficient command-reordering201910,198,188Disk drive that efficiently handles random mixed-R/W command-streams20199,996,303Hybrid-HDD that gives up old NAND data at the last moment20189,940,051Power state change in disk drive based on disk access history20189,804,784'Low-overhead storage of a hibernation file in a hybrid disk drive'20179,747,043'Write reordering in a hybrid disk drive'20179,703,699'Hybrid-HDD policy for what host-R/W data goes into NAND'20179,536,619'Hybrid-HDD with improved data retention'20179,459,802'Hybrid-HDD that limits dirty data in NAND'20169,417,820'Low-overhead storage of a hibernation file in a hybrid disk drive'20169,396,755'Temperature-defined data-storage policy for a hybrid disk drive'20168,982,499'Timing of power state change in a disk drive based on disk access history'20158,203,802'Proximity detection method for magnetic head and recording medium'20128,018,669'Proximity detection method for magnetic head and recording medium'20118,004,788'Proximity detection method for magnetic head and recording medium'20117,894,156'Determination of wedge offset correction values for a disk drive'20117,864,476'Low track-per-inch (TPI) zone with reduced need for adjacent-track-erasure (ATE) refresh'20117,721,049'Disk drive write method'20107,719,781'Method and apparatus for phase-shift null-burst-pattern'20107,623,312'Hard disk drive off track event method and device'20097,502,283'Systems and methods for rewriting data of data tracks potentially affected by data transfer operations in rotatable storage media'20097,457,066'Method and apparatus for phase-shift null-burst-pattern'20087,440,224'Disk drive servo'20087,375,441'Systems and methods for dynamically affecting power dissipation in a disk drive including a fixed output voltage regulator'20087,352,527'Disk drive that balances seek speed and seek acoustics'20087,330,330'Systems for self-servowriting in multiple portions with multiple passes per servowriting step'20087,298,568'Systems and methods for using worf to identify burst patterns for repair'20077,292,402'Systems and methods for multipass servowriting with a null burst pattern'20077,274,527'Method for optimizing dynamic stroke in the self servo-write process'20077,265,931'Apparatus to reject disk drive disturbance'20077,262,930'Systems and methods for repairable servo burst patterns'20077,256,956'Propagation self servowrite using self-written spiral signals for in-process calibration'20077,245,451'Methods using extended servo patterns with variable multi-pass servowriting and self-servowriting'20077,227,714'Methods for conditional servowriting'20077,215,498'Dynamic stroke optimization in the self servo-write process'20077,206,157'Systems and methods for two-step self-servowriting using optimal intermediate pattern'20077,206,148'Variable frequency chevron in printed media reference pattern to improve servo demodulation'20077,199,962'Systems using extended servo patterns with multi-pass servowriting and self-servowriting'20077,190,546'Systems using extended servo patterns with variable multi-pass servowriting and self-servowriting'20077,180,695'Systems for self-servowriting with multiple passes per servowriting step'20077,180,696'Methods for selective multi-pass servowriting and self-servowriting'20077,177,110'Systems and rotatable media for increasing the usable position error signal (PES) region'20077,177,109'Methods for increasing the usable position error signal (PES) region'20077,174,421'HDD with rapid availability of critical data after critical event'20077,170,707'Systems and methods for reducing power dissipation in a disk drive including an adjustable output voltage regulator'20077,167,336'Method for providing variable gain, iterative embedded runout correction in a disk drive'20077,167,335'Systems for variable multi-pass servowriting and self-servowriting'20077,149,043'Methods for self-servowriting using write-current variation'20067,136,251'Methods for WORF improvement in conditional servowriting'20067,133,240'Systems and methods for two-step self-servowriting without removing timing eccentricity on intermediate patterns'20067,130,146'Two-pass-per-track servo burst patterns'20067,116,511'Systems and methods for two-step reference pattern self-servowriting'20067,110,209'Systems and methods for efficient writing of low-RRO phase-burst servo patterns'20067,106,548'Methods for WORF improvement in conditional servowriting'20067,106,543'Methods for self-servowriting with multiple passes per servowriting step'20067,099,107'Systems and methods for two-step self-servowriting using per-head final pattern writing'20067,099,105'Systems for selective multi-pass servowriting and self-servowriting'20067,095,580'Methods to determine gross and fine positioning on a reference surface of a media'20067,092,183'Template pattern for improving printed media self-servo writing'20067,092,177'Methods for searching for SAM patterns using multiple sets of servo demodulation detection parameters'20067,092,182'Marker-zone to determine gross positioning on a reference surface of a media'20067,088,546'Method to reject disk drive disturbance'20067,075,742'Servo demodulator systems including multiple servo demodulators'20067,072,128'Methods for searching for SAM patterns at multiple nominal frequencies'20067,061,708'Systems and methods for conditional servowriting'20067,054,083'Systems for searching for SAM patterns at multiple nominal frequencies'20067,054,092'Methods for improving printed media self-servo writing'20067,027,244'Systems for self-servowriting using write-current variation'20067,019,925'Variable frequency chevron in printed media reference pattern to improve servo demodulation'20067,016,133'Systems for detecting multiple occurrences of a SAM pattern to thereby improve servo-demodulation robustness'20067,009,802'Systems and methods for printed-media SSW reference pattern with extra servo bursts used near OD'20067,006,315'Systems for improving servo-demodulation robustness'20067,006,311'Systems for preventing channel control values from being corrupted to thereby improve servo-demodulation robustness'20067,006,312'Methods for preventing channel control values from being corrupted to thereby improve servo-demodulation robustness'20066,999,264'Methods for variable multi-pass servowriting and self-servowriting'20066,995,937'Methods using extended servo patterns with multi-pass servowriting and self-servowriting'20066,995,935'Methods for detecting multiple occurrences of a SAM pattern to thereby improve servo-demodulation robustness'20066,995,940'Systems for WORF improvement in conditional servowriting'20066,992,856'Systems for limiting channel control values to thereby improve servo-demodulation robustness'20066,992,855'Methods for limiting channel control values to thereby improve servo-demodulation robustness'20066,987,632'Systems for conditional servowriting'20066,946,854'Ramp arrangement and method for measuring the position of an actuator in a rotating media data storage device'20056,943,981'Methods for improving servo-demodulation robustness'20056,933,735'Ramp arrangement and method for measuring the position of an actuator in a rotating media data storage device'20056,519,107'Hard disk drive having self-written servo burst patterns'20036,452,990'Synchronous detection of wide bi-phase coded servo information for disk drive'20026,061,200'In-drive correction of servo pattern errors'20005,862,005'Synchronous detection of wide bi-phase coded servo information for disk drive'19995,793,559'In drive correction of servo pattern errors'19985,777,760'Position feedback system for volume holographic storage media'19985,444,583'Disk drive having on-board triggered digital sampling analyzer'19955,325,247'Digital multi-rate notch filter for sampled servo digital control system'1994

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1994–2000Patents assigned to QUANTUM CORP (6)· patent assignee history
1994Based in Campbell, CA, US· patent location history
1995Based in Santa Clara, CA, US· patent location history
1998–2021Based in Saratoga, CA, US· patent location history
2002–2008Patents assigned to MAXTOR CORP (4)· patent assignee history
2005–2008Patents assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO LTD (57)· patent assignee history
2009–2021Patents assigned to TOSHIBA KK (28)· patent assignee history
2020–2021Patents assigned to TOSHIBA ELECTRONIC DEVICES & STORAGE CORP (5)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD572005–2008
TOSHIBA KK282009–2021
QUANTUM CORP61994–2000
TOSHIBA ELECTRONIC DEVICES & STORAGE CORP52020–2021
MAXTOR CORP42002–2008
Locations
LocationPatentsSpan
Saratoga, California, US991998–2021
Santa Clara, California, US11995
Campbell, California, US11994