Inventor
Atsumi Watanabe
Inventor
Hitachi, JP
Overview
Patents· 15 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 transducer20%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems15%
F23NRegulating or controlling combustion10%
A01NPreservation of bodies of humans or animals or plants or parts thereof5%
A61JContainers specially adapted for medical or pharmaceutical purposes5%
A61MDevices for introducing media into, or onto, the body5%
G01SRadio direction-finding5%
G05DSystems for controlling or regulating non-electric variables5%
G08GTraffic control systems5%
H01LSemiconductor devices5%
PatentTitleYear
11,033,030Liquid composition comprising mefentrifluconazole202110,978,586Switching device202110,953,163Medicine injection device202110,908,271Mining work machine and obstacle discrimination device20215,177,717'Optical memory medium and its information recording and erasing method and apparatus'19934,841,514'Optical recording method and apparatus using two fight spots'19894,764,913'Signal processing apparatus for disc memory devices'19884,718,053'Optical information apparatus and method of recording and erasing information'19884,622,922'Combustion control method'19864,620,491'Method and apparatus for supervising combustion state'19864,562,507'Protective relay'19854,223,236'Gate controlling apparatus for a thyristor valve'19804,210,956'Method and system of controlling high voltage direct current power transmission plants'19804,100,434'Gate controlling apparatus for a thyristor valve'19784,028,607'Inverter control system'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1993Patents assigned to HITACHI LTD (11)· patent assignee history
1977–1989Based in Hitachi, JP· patent location history
2021Patents assigned to DENSO CORP (1)· patent assignee history
2021Patents assigned to HITACHI CONSTRUCTION MACH CO (1)· patent assignee history
2021Patents assigned to PHC HOLDINGS CORP (1)· patent assignee history
2021Patents assigned to SUMITOMO CHEMICAL CO (1)· patent assignee history
2021Based in Takarazuka, JP· patent location history
2021Based in Toyota, JP· patent location history
2021Based in Ehime, JP· patent location history
2021Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 11 | 1977–1993 |
| DENSO CORP | 1 | 2021 |
| HITACHI CONSTRUCTION MACH CO | 1 | 2021 |
| PHC HOLDINGS CORP | 1 | 2021 |
| SUMITOMO CHEMICAL CO | 1 | 2021 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hitachi, JP | 9 | 1977–1989 |
| Takarazuka, JP | 1 | 2021 |
| Toyota, JP | 1 | 2021 |
| Ehime, JP | 1 | 2021 |
| Tokyo, JP | 1 | 2021 |