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Inventor

Hengchang Guo

Inventor
Rancho Santa Margarita, CA, US

Overview

6→
Patents
2005–2020
Patent span
Physics
Primary field (CPC G)

Patents· 6 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 transducer75%
G06FElectric digital data processing13%
H03HImpedance networks, e.g. resonant circuits13%
PatentTitleYear
10,629,234Data storage device computing notch filters for multiple temperatures20208,797,664'Polarity detection of piezoelectric actuator in disk drive'20148,743,503'Disk drive updating compensation values for multiple servo sectors based on PES generated for current servo sector'20148,553,351'Disk drive correcting track ID in response to an estimated radial location and a burst PES'20137,295,395'Sensing a prior transducer position by a motion pattern'20076,873,490'Control object positioning using jerk, current and time optimized control profiles'2005

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2005–2007Patents assigned to SEAGATE TECHNOLOGY LLC (2)· patent assignee history
2005–2007Based in Singapore, SG· patent location history
2013–2020Patents assigned to WESTERN DIGITAL TECH INC (4)· patent assignee history
2013Patents assigned to CHEN MIN (1)· patent assignee history
2013Patents assigned to GUO HENGCHANG (1)· patent assignee history
2013Patents assigned to JI CHUANWEN (1)· patent assignee history
2013–2020Based in Rancho Santa Margarita, CA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
WESTERN DIGITAL TECH INC42013–2020
SEAGATE TECHNOLOGY LLC22005–2007
CHEN MIN12013
GUO HENGCHANGself12013
JI CHUANWEN12013
Locations
LocationPatentsSpan
Rancho Santa Margarita, California, US42013–2020
Singapore, SG22005–2007