Inventor

MA ZHANGUO

CN4 patents

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

UNIV CHINA MINING

2 patents

US12326222B1Jun 10, 2025

Sealing structure of underground high-pressure gas storage and construction method thereof

UNIV CHINA MINING1 citations56

US9850747B2Dec 26, 2017

Fissured substrata water pumping apparatus and method

UNIV CHINA MINING0 citations40

PETROCHINA CO LTD

1 patent

US11313192B2Apr 26, 2022

Method for lowering oil pipe in gas well without well-killing, soluble bridge plug and material preparation method thereof

PETROCHINA CO LTD2 citations63

CHINA ACADEMY OF RAILWAY SCIENCES CORPORATION LIMITED RAILWAY ENGINEERING RES INSTITUTE

1 patent

US11136724B2Oct 5, 2021

Fiber-reinforced prestressed reinforced concrete sleeper

CHINA ACADEMY OF RAILWAY SCIENCES CORPORATION LIMITED RAILWAY ENGINEERING RES INSTITUTE1 citations50