Henan
China
6
2020-09-24
The entities that hold a legal rights for patent applications filed by inventor He Hang:
Hang He from Henan, CN has applied for patents for these inventions. The list has both pending applications and granted patents:
Detecting and repairing method for external diseases of buried drainage pipeline
#2 | 2020-09-24Trenchless rehabilitation device for disconnects on large-diameter concrete drainage pipe and method thereof
#3 | 2020-08-27Support tool and back-pressure grouting device for leakage repair of inspection well and repair method thereof
#4 | 2020-08-27Trenchless methods for forming curved hole channel with steel sleeve and pipeline lifting
#5 | 2020-08-13In-service and trenchless repair method for disconnection of drainage pipeline
#6 | 2020-08-13Trenchless integrative repair method for concrete drainage pipeline with cracking, corrosion and subsidence
6016293 ⎘