Inventor
Der-Chang Hsieh
Inventor
Thousand Oaks, CA, US
Overview
Patents· 14 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 transducer58%
H10NElectric solid-state devices not otherwise provided for16%
G01BMeasuring length, thickness or similar linear dimensions5%
G01HMeasurement of mechanical vibrations or ultrasonic, sonic or infrasonic waves5%
G02BOptical elements, systems or apparatus5%
H02KDynamo-electric machines5%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%
PatentTitleYear
7,071,597'Piezoelectric laminate motion sensing apparatus and method'20066,998,759'Piezoelectric laminate motion sensing apparatus and method'20066,603,242'Piezoelectric transducer apparatus having independent gain and phase characteristics functions of the fourth-order partial differential equations'20035,128,921'Method and apparatus for pre-compensation in an optical disc'19925,056,081'System and method for erasing light-responsive optical disks'19915,043,971'Method and apparatus for pre-compensation in an optical disc'19914,674,076'Optical memory system having improved positioning and focusing control circuitry'19874,669,074'Focusing control circuitry for an optical memory system'19874,564,757'Mirror position sensor for improved track selection in optical data disk system'19864,560,925'Mirror position sensor and associated pivot suspension for improved track selection in optical data disk system'19854,489,406'Optical memory system having a short seek capability'19844,435,797'Optical memory system having track following and seeking capabilities'19844,432,083'Optical memory system having track following'19844,432,082'Optical memory system having a long seek capability'1984Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1984–1987Patents assigned to BURROUGHS CORP (8)· patent assignee history
1984–1987Based in Thousand Oaks, CA, US· patent location history
1991–1992Patents assigned to TANDY CORP (3)· patent assignee history
1991–1992Based in Cupertino, CA, US· patent location history
1991Based in Cupertion, CA, US· patent location history
2003–2006Based in Taipei, TW· patent location history
2006Patents assigned to HSIEH DER-CHANG (2)· patent assignee history
2006Patents assigned to HSU YU-HSIANG (2)· patent assignee history
2006Patents assigned to HUANG LONG-SUN (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BURROUGHS CORP | 8 | 1984–1987 |
| TANDY CORP | 3 | 1991–1992 |
| HSIEH DER-CHANGself | 2 | 2006 |
| HSU YU-HSIANG | 2 | 2006 |
| HUANG LONG-SUN | 2 | 2006 |
Locations
| Location | Patents | Span |
|---|---|---|
| Thousand Oaks, California, US | 8 | 1984–1987 |
| Taipei, TW | 3 | 2003–2006 |
| Cupertino, California, US | 2 | 1991–1992 |
| Cupertion, California, US | 1 | 1991 |