Inventor
Yoshifumi Homma
Inventor
Hitachi, JP
Overview
Patents· 6 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Nprimary
H04NPictorial communication, e.g. television33%
G02BOptical elements, systems or apparatus17%
G06KGraphical data reading17%
B41JTypewriters8%
E04HBuildings or like structures for particular purposes8%
G03GElectrography8%
Y10TTechnical subjects covered by former us classification8%
PatentTitleYear
5,132,728'Drum driving unit of electrophotography printer'19925,081,544'Optical scanning apparatus'19924,809,042'Light beam scanning device and electronic photographic recording device using the same'19894,620,768'Optical scanning system'19864,612,555'Laser beam scanner apparatus'19864,513,300'Apparatus for driving a semiconductor laser for use in a laser-beam printer'1985Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1985–1992Patents assigned to HITACHI LTD (6)· patent assignee history
1985–1986Patents assigned to HITACHI KOKI KK (2)· patent assignee history
1985Based in Ibaraki, JP· patent location history
1986–1992Based in Hitachi, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 6 | 1985–1992 |
| HITACHI KOKI KK | 2 | 1985–1986 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hitachi, JP | 5 | 1986–1992 |
| Ibaraki, JP | 1 | 1985 |