Inventor
Shozi Yoshikawa
Inventor
Tokyo, JP
Overview
Patents· 11 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 transducer43%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light29%
G01NInvestigating or analysing materials by determining their chemical or physical properties7%
G01RMeasuring electric variables7%
G06KGraphical data reading7%
H03KPulse technique7%
PatentTitleYear
4,858,219'Optical information recording reproducing memory system with both power control and optical irradiation inhibiting circuit'19894,748,605'Bias-magnetic-field generating apparatus in magneto-optical information writing and erasing system'19884,745,610'Semiconductor laser drive device with an abnormal voltage protection circuit'19884,745,609'Stabilized laser device'19884,745,588'Tracking control apparatus'19884,734,914'Stabilized laser apparatus'19884,728,188'Light source degeradation detecting apparatus for laser device'19884,718,068'Stabilized laser device of optical information recording/reproduction apparatus'19884,713,819'Semiconductor laser driver'19874,520,280'Apparatus for detecting input signal'19854,499,572'Method for reading information or defect out of rotating disc'1985Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1985–1989Patents assigned to OLYMPUS OPTICAL CO (11)· patent assignee history
1985–1989Based in Hachioji, JP· patent location history
1987–1988Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| OLYMPUS OPTICAL CO | 11 | 1985–1989 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 7 | 1987–1988 |
| Hachioji, JP | 4 | 1985–1989 |