Individual holder
KRUG DAVID A
US·6 granted patents·2 pending applications·65 citations·filing 2006–2024
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
8 records- 0189US8844626B1Method and apparatus for autonomous oil and gas well down-hole pump leakage testingKRUG DAVID A·Filed 2011·Granted Sep 30, 2014·27 cites·52 claims
- 0285US12037997B2Rod pumping surface unitKRUG DAVID A·Filed 2022·Granted Jul 16, 2024·2 cites·37 claims
- 0384US8562308B1Regenerative hydraulic lift systemKRUG DAVID A·Filed 2011·Granted Oct 22, 2013·12 cites·7 claims
- 0479US8083499B1Regenerative hydraulic lift systemKRUG DAVID A·Filed 2006·Granted Dec 27, 2011·24 cites·4 claims
- 0568US12540612B2Hydraulic powerhouse system for an oil well pumping unitKRUG DAVID A·Filed 2024·Granted Feb 3, 2026·0 cites·30 claims
- 0639US2015078926A1Regenerative hydraulic lift systemKRUG DAVID A·Filed 2013·Application pending·0 cites
- 0738US12529373B1Method for autonomous control of oil and gas well down-hole pump surface unit and reduction of gas interferenceKRUG DAVID A·Filed 2021·Granted Jan 20, 2026·0 cites·17 claims
- 0832US2017107804A1Hybrid prime motivator for rod pump hydraulic surface unitKRUG DAVID A·Filed 2015·Application pending·0 cites
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →