Inventor · disambiguated record
James Preston Koffer
Also filed as: KOFFER JAMES PRESTON
3 granted patents·83 citations·filing 2014–2018
72Inventor score
Technology areasE21B
Files withCHEVRON USA INC3
Top patents by PatentIndex Score
3 records- 0195US9840898B2System and methods for controlled fracturing in formationsCHEVRON USA INC·Filed 2014·Granted Dec 12, 2017·44 cites·21 claims
- 0294US9890627B2System and methods for controlled fracturing in formationsCHEVRON USA INC·Filed 2014·Granted Feb 13, 2018·39 cites·35 claims
- 0355US10400568B2System and methods for controlled fracturing in formationsCHEVRON USA INC·Filed 2018·Granted Sep 3, 2019·0 cites·45 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →