Inventor
Atsuo Osawa
Inventor
Yokohama, JP
Overview
Patents· 16 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 transducer30%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them20%
G02BOptical elements, systems or apparatus15%
G06FElectric digital data processing5%
G06QInformation and communication technology [ict] specially adapted for administrative, commercial, financial, managerial or supervisory purposes5%
G06TImage data processing or generation, in general5%
G09BEducational or demonstration appliances5%
G09GArrangements or circuits for control of indicating devices using static means to present variable information5%
H01JElectric discharge tubes or discharge lamps5%
H04NPictorial communication, e.g. television5%
PatentTitleYear
6,396,506'Display operation method to change the number of images to be displayed and to independently change image direction and rotation of each image'20026,130,786'Projection lens and image display device'20005,933,280'Projection lens and image display device'19995,926,153'Multi-display apparatus'19995,892,492'Plasma display panel with optical filters'19995,659,424'Projecting lens and image display device'19975,590,943'Rear projection type image display apparatus and transmission type screen used therein'19975,513,037'Rear-projection screen and a rear projection image display employing the rear-projection screen'19965,485,308'Rear-projection type image display apparatus and rear-projection type screen'19965,400,114'Rear-projection screen and a rear projection image display employing the rear-projection screen'1995RE033784'Magnetic recording/reproducing apparatus for recording onto or reproducing from a magnetic tape'19914,899,235'Magnetic tape loading mechanism and method'19904,862,300'Tape guide moving mechanism for magnetic record reproducing apparatus'19894,780,783'Locking device for a cover of magnetic tape cartridge'19884,748,521'Magnetic recording/reproducing apparatus for recording onto or reproducing from a magnetic tape'19884,725,910'Rotary magnetic head assembly'1988Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1988–2002Patents assigned to HITACHI LTD (15)· patent assignee history
1988–1990Patents assigned to HITACHI VIDEO ENG (2)· patent assignee history
1988Patents assigned to HITACHI MAXELL (1)· patent assignee history
1988–2002Based in Yokohama, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 15 | 1988–2002 |
| HITACHI VIDEO ENG | 2 | 1988–1990 |
| HITACHI MAXELL | 1 | 1988 |
Locations
| Location | Patents | Span |
|---|---|---|
| Yokohama, JP | 16 | 1988–2002 |