Inventor
Michael Chang
Inventor
San Jose, CA, US
Overview
Patents· 21 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 transducer39%
G06FElectric digital data processing18%
H04LTransmission of digital information, e.g. telegraphic communication14%
A61BDiagnosis7%
G06QInformation and communication technology [ict] specially adapted for administrative, commercial, financial, managerial or supervisory purposes7%
H02JElectric power networks4%
H04WWireless communication networks4%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications4%
Y04SSystems integrating technologies related to power network operation, communication or information technologies for improving the electrical power generation, transmission, distribution, management or usage, i.e. smart grids4%
PatentTitleYear
10,820,917Pedicle subtraction osteotomy guide202010,681,043System and method for biometric authentication using social network202010,503,773Tagging of documents and other resources to enhance their searchability201910,291,610System and method for biometric authentication using social network201910,031,975Presentation of search results based on the size of the content sources from which they are obtained20189,940,359Data-partitioned secondary index (DPSI) partition level join20189,454,989'Disk drive adjusting estimated servo state to compensate for transient when crossing a servo zone boundary'20169,153,263'Disk drive detecting mini wedge by evaluating wedge ID of servo sector'20159,129,630'Data storage device employing full servo sectors on first disk surface and mini servo sectors on second disk surface'20159,088,489'Simplified activation and management of wireless wide area network (WWAN) account'20159,053,712'Data storage device reading servo sector while writing data sector'20159,025,269'Disk drive compensating for cycle slip of disk locked clock when reading mini-wedge'20158,995,075'Disk drive adjusting estimated servo state to compensate for transient when crossing a servo zone boundary'20158,982,503'Disk drive generating feed-forward compensation value based on two points of a sinusoidal control signal'20158,941,945'Data storage device servoing heads based on virtual servo tracks'20158,934,186'Data storage device estimating servo zone to reduce size of track address'20158,780,477'Disk drive adjusting servo timing to compensate for transient when crossing a servo zone boundary'20148,576,506'Disk drive estimating reader/writer gap across servo zones'20138,190,275'Peer-to-peer home automation management'20128,086,757'Intelligent gateway for heterogeneous peer-to-peer home automation networks'20116,631,990'System for measuring distances in the anterior chamber of the eye'2003Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2011–2012Patents assigned to CHANG MICHAEL ALAN (2)· patent assignee history
2011–2012Based in Saratoga, CA, US· patent location history
2013–2016Patents assigned to WESTERN DIGITAL TECH INC (11)· patent assignee history
2013–2015Patents assigned to CHANG MICHAEL (4)· patent assignee history
2013–2015Patents assigned to GUO GUOXIAO (3)· patent assignee history
2013–2018Based in San Jose, CA, US· patent location history
2015–2019Patents assigned to SONY CORP (3)· patent assignee history
2015–2019Based in San Diego, CA, US· patent location history
2019–2020Based in Fremont, CA, US· patent location history
2020Based in Phoenix, AZ, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| WESTERN DIGITAL TECH INC | 11 | 2013–2016 |
| CHANG MICHAELself | 4 | 2013–2015 |
| GUO GUOXIAO | 3 | 2013–2015 |
| SONY CORP | 3 | 2015–2019 |
| CHANG MICHAEL ALANself | 2 | 2011–2012 |
Locations
| Location | Patents | Span |
|---|---|---|
| San Jose, California, US | 12 | 2013–2018 |
| San Diego, California, US | 3 | 2015–2019 |
| Fremont, California, US | 2 | 2019–2020 |
| Saratoga, California, US | 2 | 2011–2012 |
| Phoenix, AZ, US | 1 | 2020 |