Inventor · disambiguated record
John D. Birkenholz
Also filed as: BIRKENHOLZ JOHN D
4 granted patents·4 pending applications·0 citations·filing 2016–2024
56Inventor score
Files withINNOVAPREP LLC8
Top patents by PatentIndex Score
8 records- 0180US2024385089A1Prefilters for particle concentratorsINNOVAPREP LLC·Filed 2024·Application pending·0 cites
- 0276US12050162B2Prefilters for particle concentratorsINNOVAPREP LLC·Filed 2022·Granted Jul 30, 2024·0 cites·19 claims
- 0370US12491507B2Liquid to liquid biological particle concentrator with disposable fluid pathINNOVAPREP LLC·Filed 2021·Granted Dec 9, 2025·0 cites·20 claims
- 0469US2025130145A1Devices, systems and methods for sample collection, transport, and concentration of target particles from liquidsINNOVAPREP LLC·Filed 2024·Application pending·0 cites
- 0562US11986168B2Devices, systems and methods for surface samplingINNOVAPREP LLC·Filed 2020·Granted May 21, 2024·0 cites·14 claims
- 0660US2023146816A1Large area surface sampler with invertible bagINNOVAPREP LLC·Filed 2022·Application pending·0 cites
- 0757US10842470B2Devices, systems and methods for surface samplingINNOVAPREP LLC·Filed 2016·Granted Nov 24, 2020·0 cites·18 claims
- 0846US2022125333A1Multi-function face masksINNOVAPREP LLC·Filed 2021·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →