Inventor
Yozo Shibata
Inventor
Hitachi, JP
Overview
Patents· 7 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Hprimary
H01HElectric switches46%
H01FMagnets23%
F04BPositive-displacement machines for liquids8%
F04CRotary-piston, or oscillating-piston, positive-displacement machines for liquids8%
F04DNon-positive-displacement pumps8%
H02BBoards, substations or switching arrangements for the supply or distribution of electric power8%
PatentTitleYear
7,075,398'Electromagnet and actuating mechanism for switch device, using thereof'20066,940,376'Electromagnet and actuating mechanism for switch device, using thereof'20056,816,048'Electromagnet and actuating mechanism for switch device, using thereof'20046,268,579'Vacuum switchgear'20016,259,051'Vacuum switch and a vacuum switchgear using the same'20016,144,005'Vacuum switch and a vacuum switchgear using the same'20004,580,947'Method of controlling operation of a plurality of compressors'1986Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1986–2005Patents assigned to HITACHI LTD (6)· patent assignee history
1986–2006Based in Hitachi, JP· patent location history
2004–2006Patents assigned to HITACHI ENG SERVICE (3)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 6 | 1986–2005 |
| HITACHI ENG SERVICE | 3 | 2004–2006 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hitachi, JP | 7 | 1986–2006 |