Inventor · disambiguated record

Sun Zhenfang

Also filed as: ZHENFANG SUN

1 granted patent·9 citations·filing 1990–1990

31Inventor score

Technology areasE21B

Files withRES INST OF DRILLING & PRODUCT1

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1 record

0121US5002124AUnderground temperature and pressure measuring system for hot-exploiting oil wellRES INST OF DRILLING & PRODUCT·Filed 1990·Granted Mar 26, 1991·9 cites·3 claims

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