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Inventor

Fumio Ishikawa

Inventor
Kanagawa, JP

Overview

16→
Patents
1977–1999
Patent span
Electricity
Primary field (CPC H)

Patents· 16 as inventor

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

C07Kprimary
C07KPeptides12%
H04NPictorial communication, e.g. television12%
H03DDemodulation or transference of modulation from one carrier to another9%
H03KPulse technique9%
A61KPreparations for medical, dental or toiletry purposes6%
H03BGeneration of oscillations, directly or by frequency-changing, by circuits employing active elements which operate in a non-switching manner6%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%
B60NSeats specially adapted for vehicles3%
F04DNon-positive-displacement pumps3%
F25DRefrigerators3%
PatentTitleYear
5,959,293'Defective portion detecting device with a horizontal synchronized signal'19995,841,326'Integrated oscillation circuit used for frequency conversion circuit'19985,678,895'Reclining device for seat'19975,591,596'Process for preparing a purified treponemal antigen and use thereof'19975,525,937'Frequency conversion circuit with UHF/VHF common PLL buffer'19965,474,900'Process for preparing purified syphilis antigen from Treponema palljdum'19955,223,487'Peptides as antiallergic agents'19935,140,175'Light-emitting diode drive circuit with fast rise time and fall time'19925,124,594'Digital phase comparator for use in a phase lock loop'19925,118,669'Peptides and intermediates therefor useful as antiallergic agents, vasodilators and immunoregulators'19925,079,525'Audio-video modulator system on IC chip'19924,645,946'Two phase trapezoidal signal generating circuit'19874,612,464'High speed buffer circuit particularly suited for use in sample and hold circuits'19864,540,902'Sample and hold circuit'19854,160,964'High frequency wide band resonant circuit'19794,044,570'Refrigerator'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977Patents assigned to HITACHI LTD (1)· patent assignee history
1979–1999Patents assigned to SONY CORP (10)· patent assignee history
1985–1992Based in Atsugi, JP· patent location history
1986–1999Based in Kanagawa, JP· patent location history
1992–1993Patents assigned to HITACHI CHEMICAL CO LTD (2)· patent assignee history
1992–1993Based in Ichikawa, JP· patent location history
1995–1997Patents assigned to SEKISUI CHEMICAL CO LTD (2)· patent assignee history
1995–1997Based in Takatsuki, JP· patent location history
1997Patents assigned to FUJI KIKO KK (1)· patent assignee history
1997Based in Hamamatsu, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SONY CORP101979–1999
HITACHI CHEMICAL CO LTD21992–1993
SEKISUI CHEMICAL CO LTD21995–1997
FUJI KIKO KK11997
HITACHI LTD11977
Locations
LocationPatentsSpan
Kanagawa, JP71986–1999
Takatsuki, JP21995–1997
Ichikawa, JP21992–1993
Atsugi, JP21985–1992
Hamamatsu, JP11997