Inventor
YOKOYAMA NAOKI
JP74 patents
⚠️ This page may combine multiple inventors who share the name “YOKOYAMA NAOKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
25 patentsUS4903090AFeb 20, 1990
Semiconductor device
FUJITSU LTD54 citations96
US4609903ASep 2, 1986
Thin film resistor for an integrated circuit semiconductor device
FUJITSU LTD84 citations94
US5536967AJul 16, 1996
Semiconductor device including Schottky gate of silicide and method for the manufacture of the same
FUJITSU LTD20 citations93
US5311465AMay 10, 1994
Semiconductor memory device that uses a negative differential resistance
FUJITSU LTD34 citations93
US4821090AApr 11, 1989
Compound semiconductor integrated circuit device
FUJITSU LTD39 citations93
US4712121ADec 8, 1987
High-speed semiconductor device
FUJITSU LTD39 citations93
US4566021AJan 21, 1986
Semiconductor device
FUJITSU LTD36 citations93
US5889296AMar 30, 1999
Semiconductor optical device and an optical processing system that uses such a semiconductor optical system
FUJITSU LTD39 citations92
US5389804AFeb 14, 1995
Resonant-tunneling heterojunction bipolar transistor device
FUJITSU LTD24 citations92
US5130766AJul 14, 1992
Quantum interference type semiconductor device
FUJITSU LTD25 citations92
US4889831ADec 26, 1989
Method of forming a high temperature stable ohmic contact to a III-V substrate
FUJITSU LTD50 citations92
US4617724AOct 21, 1986
Process for fabricating heterojunction bipolar transistor with low base resistance
FUJITSU LTD44 citations92
US4849934AJul 18, 1989
Logic circuit using resonant-tunneling transistor
FUJITSU LTD21 citations82
US5200349AApr 6, 1993
Semiconductor device including schotky gate of silicide and method for the manufacture of the same
FUJITSU LTD18 citations74
US5021863AJun 4, 1991
Semiconductor quantum effect device having negative differential resistance characteristics
FUJITSU LTD9 citations74
US5003360AMar 26, 1991
Semiconductor functional element
FUJITSU LTD16 citations74
US4989052AJan 29, 1991
Quantum effect semiconductor device
FUJITSU LTD17 citations74
US5677551AOct 14, 1997
Semiconductor optical device and an optical processing system that uses such a semiconductor optical system
FUJITSU LTD14 citations73
US5151618ASep 29, 1992
Resonant-tunneling heterojunction bipolar transistor device
FUJITSU LTD11 citations73
US5031005AJul 9, 1991
Semiconductor device
FUJITSU LTD8 citations73
US5027179AJun 25, 1991
Resonant-tunneling heterojunction bipolar transistor device
FUJITSU LTD8 citations73
US4837178AJun 6, 1989
Method for producing a semiconductor integrated circuit having an improved isolation structure
FUJITSU LTD7 citations73
US4956681ASep 11, 1990
Ternary logic circuit using resonant-tunneling transistors
FUJITSU LTD5 citations63
US9355916B2May 31, 2016
Semiconductor manufacturing method and semiconductor device
FUJITSU LTD2 citations62
US5214297AMay 25, 1993
High-speed semiconductor device
FUJITSU LTD2 citations62
DENSO CORP
6 patentsUS12344075B2Jul 1, 2025
Battery heating device for vehicle
DENSO CORP3 citations74
US7707849B2May 4, 2010
Unit for ejector type refrigeration cycle
DENSO CORP5 citations63
US7320229B2Jan 22, 2008
Ejector refrigeration cycle
DENSO CORP5 citations63
US11029073B2Jun 8, 2021
Cold-storage heat exchanger
DENSO CORP0 citations62
US9032757B2May 19, 2015
Cold-storage heat exchanger
DENSO CORP1 citations62
US8973395B2Mar 10, 2015
Cold-storage heat exchanger
DENSO CORP1 citations62
KAWASAKI HEAVY IND LTD
2 patentsHITACHI INT ELECTRIC INC
2 patentsKOKUSAI ELECTRIC CO LTD
1 patentMATSUSHITA REFRIGERATION
1 patentJAPAN RADIO CO LTD
1 patentOPTREX KK
1 patentYAMADA ATSUSHI
1 patentMATSUDA YOSHIHARU
1 patentMATSUMOTO AKIRA
1 patentNIPPON STEEL CHEMICAL CO
1 patentNIPPON STEEL CHEMICAL & MAT CO LTD
1 patentOGAWA NOBUHIRO
1 patentHITACHI CHEMICAL CO LTD
1 patentCATALER CORP
1 patentSONY CORP
1 patentNIPPON KOKAN KK
1 patentSEIKO EPSON CORP
1 patentShowing the top 50 of 74 patents by PatentIndex Score.