Inventor
USAGAWA TOSHIYUKI
JP22 patents
⚠️ This page may combine multiple inventors who share the name “USAGAWA TOSHIYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
19 patentsUS5332910AJul 26, 1994
Semiconductor optical device with nanowhiskers
HITACHI LTD222 citations97
US5567961AOct 22, 1996
Semiconductor device
HITACHI LTD62 citations96
US5233205AAug 3, 1993
Quantum wave circuit
HITACHI LTD61 citations94
US5746826AMay 5, 1998
Method and apparatus for forming microstructure body
HITACHI LTD20 citations92
US5455451AOct 3, 1995
Superconductized semiconductor device using penetrating Cooper pairs
HITACHI LTD46 citations92
US5181087AJan 19, 1993
Semiconductor device and method of producing the same
HITACHI LTD37 citations92
US4710787ADec 1, 1987
Semiconductor device
HITACHI LTD21 citations82
US4683487AJul 28, 1987
Heterojunction bipolar transistor
HITACHI LTD20 citations82
US5293084AMar 8, 1994
High speed logic circuit
HITACHI LTD12 citations74
US5381027AJan 10, 1995
Semiconductor device having a heterojunction and a two dimensional gas as an active layer
HITACHI LTD18 citations73
US5373191ADec 13, 1994
Semiconductor device and method of producing the same
HITACHI LTD14 citations73
US5258631ANov 2, 1993
Semiconductor device having a two-dimensional electron gas as an active layer
HITACHI LTD13 citations73
US4605945AAug 12, 1986
Semiconductor device
HITACHI LTD15 citations73
US5670804ASep 23, 1997
PN-junction gate FET
HITACHI LTD13 citations69
US4805005AFeb 14, 1989
Semiconductor device and manufacturing method of the same
HITACHI LTD5 citations63
US7541811B2Jun 2, 2009
Apparatus for electron spin resonance CT
HITACHI LTD4 citations62
US9484448B2Nov 1, 2016
Semiconductor gas sensor and method for producing the same
HITACHI LTD1 citations52
US10466198B2Nov 5, 2019
Gas sensor
HITACHI LTD0 citations42
US9857322B2Jan 2, 2018
Semiconductor gas sensor
HITACHI LTD0 citations41