Hisashi YOKOYAMA

Follow

Person

Ibaraki, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Injector diagnosis device and injector diagnosis method
- Patent number 11,732,669
- Issue date Aug 22, 2023
- Hitachi Construction Machinery Co., Ltd.
- Tien Trien Le
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Injector failure diagnostic device and injector failure diagnostic...
- Patent number 11,655,774
- Issue date May 23, 2023
- Hitachi Construction Machinery Co., Ltd.
- Tien Trien Le
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS

Patents Applicationslast 30 patents

Information Patent Application
Noise Calculation Device and Sound Collection System
- Publication number 20250140279
- Publication date May 1, 2025
- Hitachi Construction Machinery Co., Ltd.
- Shogo KUNIOKA
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Injector Diagnosis Device and Injector Diagnosis Method
- Publication number 20220170427
- Publication date Jun 2, 2022
- Hitachi Construction Machinery Co., Ltd.
- Tien Trien LE
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
INJECTOR FAILURE DIAGNOSTIC DEVICE AND INJECTOR FAILURE DIAGNOSTIC...
- Publication number 20220154661
- Publication date May 19, 2022
- Hitachi Construction Machinery Co., Ltd.
- Tien Trien LE
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS