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Inventor

Tetsuya Hirashima

Inventor
Katsuta, JP

Overview

4→
Patents
1988–1993
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.

H03Hprimary
H03HImpedance networks, e.g. resonant circuits100%
PatentTitleYear
5,202,652'Surface acoustic wave filter device formed on a plurality of piezoelectric substrates'19935,087,901'Surface acoustic wave band-pass filter with different phase weighted transducers'19924,939,487'Surface acoustic wave filter'19904,775,814'Saw device'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988–1993Patents assigned to HITACHI LTD (4)· patent assignee history
1988Based in Yokohama, JP· patent location history
1990–1993Based in Katsuta, JP· patent location history
1992Based in Ibaraki, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD41988–1993
Locations
LocationPatentsSpan
Katsuta, JP21990–1993
Ibaraki, JP11992
Yokohama, JP11988