Inventor · disambiguated record
Zhiguo Song
Also filed as: SONG ZHIGUO
5 granted patents·4 pending applications·9 citations·filing 2018–2023
66Inventor score
Files withZHEJIANG DUNAN ARTIFICIAL ENV CO LTD8JIANGHAN MACHINERY RES INSTITUTE LIMITED COMPANY OF CNPC1
Top patents by PatentIndex Score
9 records- 0184US12429138B2Connection for valve seat and valve body unitZHEJIANG DUNAN ARTIFICIAL ENV CO LTD·Filed 2023·Granted Sep 30, 2025·1 cites·13 claims
- 0284US10309171B1Coiled tubing reel and coiled tubing vehicleJIANGHAN MACHINERY RES INSTITUTE LIMITED COMPANY OF CNPC·Filed 2018·Granted Jun 4, 2019·8 cites·12 claims
- 0369US2024151310A1Electric ValveZHEJIANG DUNAN ARTIFICIAL ENV CO LTD·Filed 2022·Application pending·0 cites
- 0456US12473990B2Valve deviceZHEJIANG DUNAN ARTIFICIAL ENV CO LTD·Filed 2023·Granted Nov 18, 2025·0 cites·11 claims
- 0555US12404941B2Combined four-way valve, air conditioning system and vehicleZHEJIANG DUNAN ARTIFICIAL ENV CO LTD·Filed 2022·Granted Sep 2, 2025·0 cites·20 claims
- 0653US2024085072A1Control method, control apparatus, and electronic expansion valveZHEJIANG DUNAN ARTIFICIAL ENV CO LTD·Filed 2023·Application pending·0 cites
- 0752US11946558B2Valve body connection structure and valve assembly with valve body connection structureZHEJIANG DUNAN ARTIFICIAL ENV CO LTD·Filed 2020·Granted Apr 2, 2024·0 cites·17 claims
- 0851US2024084906A1Check valveZHEJIANG DUNAN ARTIFICIAL ENV CO LTD·Filed 2023·Application pending·0 cites
- 0945US2024301964A1Stator Assembly and Electronic Expansion Valve with Stator AssemblyZHEJIANG DUNAN ARTIFICIAL ENV CO LTD·Filed 2022·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →