Inventor · disambiguated record

Robert Cai

Also filed as: CAI ROBERT

1 granted patent·19 citations·filing 2015–2015

39Inventor score

Technology areasE21B

Files withNAT OILWELL VARCO LP1

Top patents by PatentIndex Score

1 record

0190US9650840B2Method and apparatus for erecting a drilling rigNAT OILWELL VARCO LP·Filed 2015·Granted May 16, 2017·19 cites·20 claims

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