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Inventor

Akio Sagawa

Inventor
Hitachi, JP

Overview

4→
Patents
1977–1984
Patent span
Electricity
Primary field (CPC H)

Patents· 4 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

F02Pprimary
F02PIgnition, other than compression ignition, for internal-combustion engines20%
G01MTesting static or dynamic balance of machines or structures20%
H03KPulse technique20%
H04MTelephonic communication20%
H10DInorganic electric semiconductor devices20%
PatentTitleYear
4,465,967'Current supply circuit'19844,392,069'Semiconductor switch'19834,184,086'Semiconductor switch'19804,040,294'Apparatus for detecting misfire in multicylinder internal combustion engine'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1984Patents assigned to HITACHI LTD (4)· patent assignee history
1977–1984Based in Hitachi, JP· patent location history
1984Patents assigned to NIPPON TELEGRAPH & TELEPHONE (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD41977–1984
NIPPON TELEGRAPH & TELEPHONE11984
Locations
LocationPatentsSpan
Hitachi, JP41977–1984