Inventor

OOKUMA HIROSHI

JP4 patents

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

YOKOYAMA NORIMASA

2 patents

US9564600B2Feb 7, 2017

Compound having an indolocarbazole ring structure and organic electroluminescent device

YOKOYAMA NORIMASA1 citations49

US9553272B2Jan 24, 2017

Organic electroluminescent device

YOKOYAMA NORIMASA0 citations39

QUON TECH LTD

1 patent

US11741839B2Aug 29, 2023

Traffic safety assistance device, mobile information terminal, and program

QUON TECH LTD2 citations59

HODOGAYA CHEMICAL CO LTD

1 patent

US10916711B2Feb 9, 2021

Spiro compound having azafluorene ring structure, light-emitting material, and organic electroluminescent device

HODOGAYA CHEMICAL CO LTD0 citations50