Inventor
Charles A. Park
Inventor
Aromas, CA, US
Overview
Patents· 20 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 transducer44%
C01BNon-metallic elements8%
H01LSemiconductor devices8%
H10NElectric solid-state devices not otherwise provided for8%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds6%
H10FInorganic semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation6%
Y10TTechnical subjects covered by former us classification6%
C01GCompounds containing metals not covered by subclasses c01d or c01f3%
C04BLime, magnesia3%
C30BSingle-crystal growth3%
PatentTitleYear
11,127,891Compound semiconductor and use thereof202111,124,860Compound semiconductor and use thereof202111,097,947Chalcogen-containing compound, its preparation method and thermoelectric element comprising the same202111,072,530Compound semiconductor and use thereof20219,245,560'Data storage device measuring reader/writer offset by reading spiral track and concentric servo sectors'20169,208,810'Data storage device attenuating interference from first spiral track when reading second spiral track'20158,982,490'Data storage device reading first spiral track while simultaneously writing second spiral track'20158,917,474'Disk drive calibrating a velocity profile prior to writing a spiral track'20148,896,957'Disk drive performing spiral scan of disk surface to detect residual data'20148,891,191'Data storage device initializing read signal gain to detect servo seed pattern'20148,861,123'Disk drive servoing on first disk surface while erasing second disk surface'20148,743,504'Servoing on zoned concentric servo sectors of a first disk surface to write a spiral servo track to a second disk surface'20148,724,245'Disk drive employing overlapping servo zones to facilitate servo zone crossing'20148,634,154'Disk drive writing a sync mark seam in a bootstrap spiral track'20148,634,283'Disk drive performing in-drive spiral track writing'20148,498,076'Disk drive biasing timing recovery measurements for spiral tracks based on radial location of head'20137,852,592'Spiral slope approximation of spiral patterns written to a disk of a disk drive'20107,656,604'Disk drive demodulating a spiral track by finding a maximum correlation between a spiral track crossing signal and a time-shifted nominal spiral track crossing signal'20107,035,026'Method of manufacturing and disk drive produced by measuring the read and write widths and varying the track pitch in the servo-writer'20066,885,514'Method of manufacturing and disk drive produced by measuring the read and write widths and varying the track pitch in the servo-writer'2005Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2005–2016Patents assigned to WESTERN DIGITAL TECH INC (16)· patent assignee history
2005–2016Based in Aromas, CA, US· patent location history
2013–2014Patents assigned to PARK CHARLES A (6)· patent assignee history
2013–2014Patents assigned to SHEH EDGAR D (4)· patent assignee history
2014Patents assigned to RIGNEY BRIAN P (3)· patent assignee history
2021Patents assigned to LG CHEMICAL LTD (3)· patent assignee history
2021Based in Daejeon, KR· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| WESTERN DIGITAL TECH INC | 16 | 2005–2016 |
| PARK CHARLES Aself | 6 | 2013–2014 |
| SHEH EDGAR D | 4 | 2013–2014 |
| LG CHEMICAL LTD | 3 | 2021 |
| RIGNEY BRIAN P | 3 | 2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Aromas, California, US | 16 | 2005–2016 |
| Daejeon, KR | 4 | 2021 |