Inventor

OKAI MAKOTO

JP35 patents

⚠️ This page may combine multiple inventors who share the name “OKAI MAKOTO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

OKAI MAKOTO

HITACHI LTD

Semiconductor laser device capable of controlling wavelength shift

Semiconductor laser device of variable wavelength type

Optical device diffraction gratings and a photomask for use in the same

Light emitting device with disordered region

Surface emitting type semiconductor laser

Wavelength-tunable semiconductor laser

Flat panel display with nanotubes

Optical information processor and semiconductor light emitting device suitable for the same

Semiconductor laser device with plural active layers and changing optical properties

Transparent conductive film and electronic device including same

Waveguide device

Waveguide device

Image display and method of driving image display

Thin film electron emitter, display device using the same and applied machine

Thin-film electron source, process for manufacturing thin-film electron source, and display

Negative electrode material for lithium ion secondary battery and manufacturing method of the same, negative electrode for lithium ion secondary battery and manufacturing method of the same, and lithium ion secondary battery

Field emission electron gun and electron beam applied device using the same

OKAI MAKOTO

Circuit board including a graphene film having contact region covering a recessed region and a patterned metal film covering the contact region and in direct electrical contact therewith, and device including same

Graphene grown substrate and electronic/photonic integrated circuits using same

Graphene grown substrate and electronic/photonic integrated circuits using same

Electronic device, light-receiving and light-emitting device, electronic integrated circuit and optical integrated circuit using the devices

Electrically connected graphene-metal electrode device, and electronic device, electronic integrated circuit and electro-optical integrated circuit using same

HITACHI DISPLAYS LTD

Emissive flat panel display having electron sources with high current density and low electric field strength

Flat panel display device with surfaces of cathodes and control electrodes lying in the same flat plane

Display device having a connecting portion between cathode line and electron source

Flat panel display device including electron beam sources and control electrodes

NAKATA TOSHIHIKO

Scanning probe microscope and method of observing sample using the same

Scanning probe microscope and method of observing sample using the same

Scanning probe microscope and method of observing sample using the same

BRITISH TELECOMM

Optical filters

Optical comb filters used with waveguide, laser and manufacturing method of same

HITACHI INC

Optical information processing equipment and semiconductor light emitting device suitable therefor

HIROOKA MOTOYUKI

Micro contact prober

YAGUCHI TOMIO

Flat panel display apparatus

HITACHI METALS LTD

Method for producing boron nitride nanotube-reinforced aluminum composite casting