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Patents Grantslast 30 patents

Information Patent Grant
Shallow-buried leakage-proof pipeline and method for operating same
- Patent number 12,085,480
- Issue date Sep 10, 2024
- HENAN POLYTECHNIC UNIVERSITY
- Hua Nan
- F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
Information Patent Grant
Mining hydraulic constant-resistance deforming and automatic pressu...
- Patent number 11,041,385
- Issue date Jun 22, 2021
- HENAN POLYTECHNIC UNIVERSITY
- Hua Nan
- E21 - EARTH DRILLING MINING
Information Patent Grant
Liquid injection type reamer bit
- Patent number 10,914,122
- Issue date Feb 9, 2021
- HENAN POLYTECHNIC UNIVERSITY
- Hua Nan
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Internal reamer for anchor shaft hole for mining
- Patent number 10,633,927
- Issue date Apr 28, 2020
- HENAN POLYTECHNIC UNIVERSITY
- Hua Nan
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
SHALLOW-BURIED LEAKAGE-PROOF PIPELINE AND METHOD FOR OPERATING SAME
- Publication number 20220268659
- Publication date Aug 25, 2022
- Henan Polytechnic University
- Hua NAN
- F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
Information Patent Application
MINING HYDRAULIC CONSTANT-RESISTANCE DEFORMING AND AUTOMATIC PRESSU...
- Publication number 20210017860
- Publication date Jan 21, 2021
- Henan Polytechnic University
- Hua NAN
- E21 - EARTH DRILLING MINING
Information Patent Application
LIQUID INJECTION TYPE REAMER BIT
- Publication number 20200362641
- Publication date Nov 19, 2020
- Henan Polytechnic University
- Hua NAN
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
INTERNAL REAMER FOR ANCHOR SHAFT HOLE FOR MINING
- Publication number 20190368275
- Publication date Dec 5, 2019
- Henan Polytechnic University
- Hua NAN
- E21 - EARTH DRILLING MINING