Inventor

KOYAMA HIROKI

JP15 patents

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

JAPAN ENERGY CORP

5 patents

US7001503B1Feb 21, 2006

Method and apparatus for stripping sulfur-containing compounds from hydrocarbon feed stock in hydrorefining of petroleum distillates

JAPAN ENERGY CORP39 citations92

US6780817B1Aug 24, 2004

Catalyst for hydrofining and method for preparation thereof

JAPAN ENERGY CORP33 citations92

US6858132B2Feb 22, 2005

Hydrofining catalyst and hydrofining process

JAPAN ENERGY CORP35 citations91

US6576119B2Jun 10, 2003

Method of producing middle distillate products by two-stage hydrocracking and hydrocracking apparatus

JAPAN ENERGY CORP13 citations79

US7335618B2Feb 26, 2008

Method for manufacturing hydrorefining catalyst, and metal recovery method

JAPAN ENERGY CORP6 citations60

HITACHI LTD

2 patents

US5757806AMay 26, 1998

Data multiplexing system having at least one low-speed interface circuit connected to a bus

HITACHI LTD10 citations73

US5452307ASep 19, 1995

Data multiplexing system having at least one low-speed interface circuit connected to a bus

HITACHI LTD14 citations73

OLYMPUS CORP

2 patents

US11134199B2Sep 28, 2021

Image pickup apparatus, image display method for image pickup apparatus, and recording medium

OLYMPUS CORP0 citations51

US10180724B2Jan 15, 2019

Operating terminal and operating method

OLYMPUS CORP0 citations38

JAPAN BROADCASTING CORP

1 patent

US5333213AJul 26, 1994

Method and apparatus for high speed dynamic image region extraction

JAPAN BROADCASTING CORP18 citations70

JAPAN ENERGY CORPORTION

1 patent

US6325919B1Dec 4, 2001

Catalyst support, catalyst, reactor for hydrogenation reaction, and catalytic reaction method

JAPAN ENERGY CORPORTION12 citations67

OMRON TATEISI ELECTRONICS CO

1 patent

US10858135B2Dec 8, 2020

Industrial control apparatus, control method, program, packaging machine, and packaging machine control apparatus

OMRON TATEISI ELECTRONICS CO1 citations62

SEIKO EPSON CORP

1 patent

US12391497B2Aug 19, 2025

Medium placing device and recording apparatus

SEIKO EPSON CORP0 citations51

OLYMPUS IMAGING CORP

1 patent

US7751702B2Jul 6, 2010

Digital camera

OLYMPUS IMAGING CORP0 citations41

HOWA TEXTILE IND CO LTD

1 patent

US9931915B2Apr 3, 2018

Sliding member, sunshade device provided with the sliding member and motor vehicle equipped with the sunshade device

HOWA TEXTILE IND CO LTD0 citations25