Inventor
Ian E. Henderson
Inventor
Tucson, AZ, US
Overview
Patents· 8 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 transducer60%
G05BControl or regulating systems in general20%
G06TImage data processing or generation, in general10%
H01QAntennas, i.e. radio aerials10%
PatentTitleYear
5,555,237'Contamination detection apparatus and method using write power calibration values'19965,535,286'Error detection in seismic data'19965,272,692'Data storage member having areas in which intensity-modulated signals are overlaid with magneto-optically recorded signals'19935,090,002'Positioning systems employing velocity and position control loops with position control loop having an extended range'19925,050,144'Recording intensity modulated signals and polarization-modulated optical signals in the same area of a storage member'19915,038,333'Positioning systems including reliable track crossing detection for high speed relative motions'19914,914,725'Transducer positioning servo mechanisms employing digital and analog circuits'19904,833,484'Earth terminal for satellite communication'1989Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1989Patents assigned to GEN ELECTRIC CO PLC (1)· patent assignee history
1989Based in Chelmsford, GB· patent location history
1990–1996Patents assigned to IBM (7)· patent assignee history
1990–1996Based in Tucson, AZ, US· patent location history
1996Patents assigned to WESTERN ATLAS INT INC (1)· patent assignee history
1996Based in Bedford, GB· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| IBM | 7 | 1990–1996 |
| GEN ELECTRIC CO PLC | 1 | 1989 |
| WESTERN ATLAS INT INC | 1 | 1996 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tucson, AZ, US | 6 | 1990–1996 |
| Bedford, GB | 1 | 1996 |
| Chelmsford, GB | 1 | 1989 |