Inventor
Toshimasa Kamisada
Inventor
Yokohama, JP
Overview
Patents· 20 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 transducer86%
G01SRadio direction-finding10%
G06TImage data processing or generation, in general5%
PatentTitleYear
10,838,063Distance measurement apparatus and angle adjustment method of the same202010,614,584Three-dimensional distance measurement apparatus20208,169,880'Optical pickup having radially arranged lenses in a low profile construction'20128,154,962'Optical pickup and optical information recording and reproducing device'20128,014,258'Optical pickup having radially arranged lenses in a low profile construction'20117,978,587'Optical pickup apparatus and optical disc apparatus with a single beam system'20117,940,630'Optical pick up apparatus with a single beam system and having a diffraction grating'20117,885,166'Optical pick up apparatus with a single beam system and having a diffraction grating'20117,733,760'Optical pickup having radially arranged lenses in a low profile construction'20107,567,495'Optical pickup apparatus and optical disc apparatus using same'20097,542,396'Information recording apparatus, information recording medium and information recording medium'20097,379,397'Optical pickup and optical disc apparatus provided with the same'20087,245,574'Optical head and its adjusting method and optical disk device using the same'20077,076,791'Optical pickup and optical disc apparatus provided with the same'20066,985,424'Laser module and optical head'20065,668,786'Magneto-optic disk apparatus having means for eliminating fluctuation component in reproduction magneto-optic signal'19975,555,539'Multi-beam split-type optical head for use in optical disk apparatus'19965,060,213'Separation type optical head'19914,841,509'Apparatus and method for detecting focus error signal and tracking error signal in an optical disk system'19894,742,218'Focus error detection apparatus utilizing focusing an front and rear sides of focal planes'1988Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1988–2009Patents assigned to HITACHI LTD (10)· patent assignee history
1988–2009Based in Hiratsuka, JP· patent location history
1989Based in Hiratuka, JP· patent location history
2006–2020Based in Tokyo, JP· patent location history
2007Based in Hiratuska, JP· patent location history
2009–2012Patents assigned to HITACHI MEDIA ELECTRON KK (8)· patent assignee history
2009–2012Based in Yokohama, JP· patent location history
2012Patents assigned to KAMISADA TOSHIMASA (2)· patent assignee history
2012Patents assigned to KAWAMURA TOMOTO (2)· patent assignee history
2020Patents assigned to HITACHI LG DATA STORAGE INC (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 10 | 1988–2009 |
| HITACHI MEDIA ELECTRON KK | 8 | 2009–2012 |
| HITACHI LG DATA STORAGE INC | 2 | 2020 |
| KAMISADA TOSHIMASAself | 2 | 2012 |
| KAWAMURA TOMOTO | 2 | 2012 |
Locations
| Location | Patents | Span |
|---|---|---|
| Yokohama, JP | 8 | 2009–2012 |
| Hiratsuka, JP | 6 | 1988–2009 |
| Tokyo, JP | 4 | 2006–2020 |
| Hiratuska, JP | 1 | 2007 |
| Hiratuka, JP | 1 | 1989 |