Inventor · disambiguated record

Kao Si

Also filed as: SI KAO

2 granted patents·2 citations·filing 2016–2020

39Inventor score

Technology areasE21B

Files withYU LICHENG2

Top patents by PatentIndex Score

2 records

0165US10760367B2Wellhead sealing device of sucker-rod pumping machineYU LICHENG·Filed 2016·Granted Sep 1, 2020·2 cites·21 claims
0252US11261687B2Wellhead sealing device of sucker-rod pumping machineYU LICHENG·Filed 2020·Granted Mar 1, 2022·0 cites·4 claims

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Kao Si — Patent Inventor | PatentIndex