Inventor
Hisashi Ohwada
Inventor
Tokyo, JP
Overview
Patents· 6 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Bprimary
G02BOptical elements, systems or apparatus43%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form14%
F02MSupplying combustion engines in general with combustible mixtures or constituents thereof14%
H04JMultiplex communication14%
Y10TTechnical subjects covered by former us classification14%
PatentTitleYear
9,291,135'Electromagnetic fuel injection valve'20166,295,150'Wavelength division multiplexing device'20015,923,800'Optical waveguide module having main-line waveguide and branch waveguides, and optical transmission device including such optical waveguide module'19995,916,402'Method for manufacturing optical element'19995,570,442'Design and manufacture of an optimized waveguide-type multiple branched star coupler'19965,091,986'Optical divider for multimode optical fiber systems'1992Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1992–2001Patents assigned to MITSUBISHI GAS CHEMICAL CO (5)· patent assignee history
1992–2001Based in Tokyo, JP· patent location history
2016Patents assigned to ABE MOTOYUKI (1)· patent assignee history
2016Patents assigned to HITACHI AUTOMOTIVE SYSTEMS LTD (1)· patent assignee history
2016Patents assigned to ISHIKAWA TOHRU (1)· patent assignee history
2016Patents assigned to OHWADA HISASHI (1)· patent assignee history
2016Based in Hitachi, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MITSUBISHI GAS CHEMICAL CO | 5 | 1992–2001 |
| ABE MOTOYUKI | 1 | 2016 |
| HITACHI AUTOMOTIVE SYSTEMS LTD | 1 | 2016 |
| ISHIKAWA TOHRU | 1 | 2016 |
| OHWADA HISASHIself | 1 | 2016 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 5 | 1992–2001 |
| Hitachi, JP | 1 | 2016 |