Inventor
NAGATSUMA KAZUYUKI
13 patents
⚠️ This page may combine multiple inventors who share the name “NAGATSUMA KAZUYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
10 patentsUS4631402ADec 23, 1986
Optical electric-field measuring apparatus
HITACHI LTD34 citations92
US4604577AAug 5, 1986
Temperature-compensated magnetic field measuring instrument
HITACHI LTD39 citations92
US4581579AApr 8, 1986
Optical magnetic-field measuring apparatus having improved temperature characteristics
HITACHI LTD43 citations92
US5098851AMar 24, 1992
Fabricating a semiconductor photodetector by annealing to smooth the PN junction
HITACHI LTD7 citations74
US4816890AMar 28, 1989
Optoelectronic device
HITACHI LTD7 citations73
US4490641ADec 25, 1984
Three electrode piezoelectric ceramic resonator
HITACHI LTD14 citations71
US4333842AJun 8, 1982
Piezoelectric single crystal and surface acoustic wave element employing the same
HITACHI LTD14 citations70
US4595853AJun 17, 1986
Apparatus for and method of determining properties of saw substrates
HITACHI LTD8 citations69
US4570064AFeb 11, 1986
Optical D.C. electric-field measuring apparatus with optic sensing means exhibiting both electrooptic and photoelectric effects
HITACHI LTD6 citations63
US4243541AJan 6, 1981
Piezoelectric ceramics
HITACHI LTD4 citations61