Inventor · disambiguated record
Toshiyuki Usagawa
Also filed as: USAGAWA TOSHIYUKI
22 granted patents·587 citations·filing 1984–2017
96Inventor score
Top patents by PatentIndex Score
22 records- 0197US5332910ASemiconductor optical device with nanowhiskersHITACHI LTD·Filed 1993·Granted Jul 26, 1994·222 cites·24 claims
- 0285US5567961ASemiconductor deviceHITACHI LTD·Filed 1993·Granted Oct 22, 1996·62 cites·40 claims
- 0385US5455451ASuperconductized semiconductor device using penetrating Cooper pairsHITACHI LTD·Filed 1993·Granted Oct 3, 1995·46 cites·37 claims
- 0484US5233205AQuantum wave circuitHITACHI LTD·Filed 1992·Granted Aug 3, 1993·61 cites·13 claims
- 0583US5181087ASemiconductor device and method of producing the sameHITACHI LTD·Filed 1989·Granted Jan 19, 1993·37 cites·52 claims
- 0670US9228973B2Gas sensorUSAGAWA TOSHIYUKI·Filed 2010·Granted Jan 5, 2016·2 cites·18 claims
- 0769US4710787ASemiconductor deviceHITACHI LTD·Filed 1984·Granted Dec 1, 1987·21 cites·9 claims
- 0865US7541811B2Apparatus for electron spin resonance CTHITACHI LTD·Filed 2007·Granted Jun 2, 2009·4 cites·17 claims
- 0963US9383329B2Gas sensor and a method of manufacturing the sameUSAGAWA TOSHIYUKI·Filed 2011·Granted Jul 5, 2016·1 cites·14 claims
- 1063US4683487AHeterojunction bipolar transistorHITACHI LTD·Filed 1985·Granted Jul 28, 1987·20 cites·19 claims
- 1161US9484448B2Semiconductor gas sensor and method for producing the sameHITACHI LTD·Filed 2013·Granted Nov 1, 2016·1 cites·12 claims
- 1260US4605945ASemiconductor deviceHITACHI LTD·Filed 1984·Granted Aug 12, 1986·15 cites·22 claims
- 1356US5373191ASemiconductor device and method of producing the sameHITACHI LTD·Filed 1992·Granted Dec 13, 1994·14 cites·5 claims
- 1451US9857322B2Semiconductor gas sensorHITACHI LTD·Filed 2013·Granted Jan 2, 2018·0 cites·18 claims
- 1550US5746826AMethod and apparatus for forming microstructure bodyHITACHI LTD·Filed 1994·Granted May 5, 1998·20 cites·40 claims
- 1649US5381027ASemiconductor device having a heterojunction and a two dimensional gas as an active layerHITACHI LTD·Filed 1993·Granted Jan 10, 1995·18 cites·18 claims
- 1749US5293084AHigh speed logic circuitHITACHI LTD·Filed 1992·Granted Mar 8, 1994·12 cites·19 claims
- 1845US5670804APN-junction gate FETHITACHI LTD·Filed 1995·Granted Sep 23, 1997·13 cites·20 claims
- 1943US5258631ASemiconductor device having a two-dimensional electron gas as an active layerHITACHI LTD·Filed 1992·Granted Nov 2, 1993·13 cites·11 claims
- 2041US10466198B2Gas sensorHITACHI LTD·Filed 2017·Granted Nov 5, 2019·0 cites·15 claims
- 2138US10151725B2Sensor system and deviceHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2015·Granted Dec 11, 2018·0 cites·10 claims
- 2235US4805005ASemiconductor device and manufacturing method of the sameHITACHI LTD·Filed 1985·Granted Feb 14, 1989·5 cites·11 claims
Join the waitlist — get patent alerts
Get an alert when Toshiyuki Usagawa files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →