Inventor · disambiguated record
Keith Wojciechowski
Also filed as: WOJCIECHOWSKI KEITH · WOJCIECHOWSKI KEITH F
59 granted patents·3 pending applications·831 citations·filing 1995–2025
99Inventor score
Top patents by PatentIndex Score
62 records- 0199US11161150B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2020·Granted Nov 2, 2021·12 cites·19 claims
- 0299US10994306B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2020·Granted May 4, 2021·11 cites·31 claims
- 0399US10981197B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2020·Granted Apr 20, 2021·11 cites·30 claims
- 0499US10974281B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2020·Granted Apr 13, 2021·11 cites·30 claims
- 0599US10259013B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2017·Granted Apr 16, 2019·27 cites·11 claims
- 0699US10046363B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2013·Granted Aug 14, 2018·40 cites·64 claims
- 0799US9884344B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2016·Granted Feb 6, 2018·51 cites·27 claims
- 0899US9409209B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2014·Granted Aug 9, 2016·54 cites·34 claims
- 0999US7578394B2Method and apparatuses for screeningDERRICK CORP·Filed 2007·Granted Aug 25, 2009·67 cites·38 claims
- 1098US11203678B2Thermoplastic compositions, methods, apparatus, and usesDERRICK CORP·Filed 2018·Granted Dec 21, 2021·10 cites·27 claims
- 1198US10576502B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2018·Granted Mar 3, 2020·11 cites·12 claims
- 1298US7228971B2Vibratory screening machine and vibratory screen and screen tensioning structureDERRICK CORP·Filed 2003·Granted Jun 12, 2007·82 cites·6 claims
- 1397US11958077B1Compression apparatuses, systems and methods for screening materialsDERRICK CORP·Filed 2023·Granted Apr 16, 2024·4 cites·30 claims
- 1497US11890647B1Compression apparatuses, systems and methods for screening materialsDERRICK CORP·Filed 2023·Granted Feb 6, 2024·6 cites·30 claims
- 1597US11471914B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2021·Granted Oct 18, 2022·2 cites·55 claims
- 1697US10843230B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2019·Granted Nov 24, 2020·6 cites·30 claims
- 1796US11426766B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2020·Granted Aug 30, 2022·2 cites·30 claims
- 1896US11413656B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2021·Granted Aug 16, 2022·2 cites·36 claims
- 1995US11471913B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2021·Granted Oct 18, 2022·2 cites·45 claims
- 2095US11198155B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2018·Granted Dec 14, 2021·7 cites·30 claims
- 2195US10835926B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2019·Granted Nov 17, 2020·3 cites·30 claims
- 2295US9056335B2Method and apparatuses for screeningDERRICK CORP·Filed 2012·Granted Jun 16, 2015·21 cites·37 claims
- 2395US8443984B2Method and apparatus for screeningWOJCIECHOWSKI KEITH·Filed 2009·Granted May 21, 2013·33 cites·8 claims
- 2495US8439203B2Method and apparatuses for pre-screeningWOJCIECHOWSKI KEITH F·Filed 2008·Granted May 14, 2013·31 cites·22 claims
- 2594US11446704B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2021·Granted Sep 20, 2022·2 cites·30 claims
- 2694US9027760B2Method and apparatuses for screeningDERRICK CORP·Filed 2012·Granted May 12, 2015·12 cites·39 claims
- 2794US6669027B1Vibratory screening machine and vibratory screen and screen tensioning structureDERRICK MFG CORP·Filed 1999·Granted Dec 30, 2003·92 cites·41 claims
- 2893US5636749AUndulating screen for vibratory screening machineDERRICK MFG CORP·Filed 1995·Granted Jun 10, 1997·96 cites·8 claims
- 2992US10967401B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2019·Granted Apr 6, 2021·2 cites·30 claims
- 3092US10933444B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2019·Granted Mar 2, 2021·2 cites·25 claims
- 3190US11638933B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2021·Granted May 2, 2023·2 cites·35 claims
- 3290US11505638B2Thermoplastic compositions, methods, apparatus, and usesDERRICK CORP·Filed 2020·Granted Nov 22, 2022·2 cites·36 claims
- 3390US11000882B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2020·Granted May 11, 2021·2 cites·30 claims
- 3490US10960438B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2020·Granted Mar 30, 2021·2 cites·30 claims
- 3588US9956591B2Method and apparatuses for screeningDERRICK CORP·Filed 2015·Granted May 1, 2018·3 cites·24 claims
- 3687US12208419B2Compression apparatuses, systems and methods for screening materialsDERRICK CORP·Filed 2024·Granted Jan 28, 2025·0 cites·30 claims
- 3787US10603692B2Method and apparatus for screeningDERRICK CORP·Filed 2018·Granted Mar 31, 2020·2 cites·18 claims
- 3886US2025128293A1Compression apparatuses, systems and methods for screening materialsDERRICK CORP·Filed 2024·Application pending·0 cites
- 3984US12491537B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2024·Granted Dec 9, 2025·0 cites·19 claims
- 4084US12128445B1Compression apparatuses, systems and methods for screening materialsDERRICK CORP·Filed 2023·Granted Oct 29, 2024·0 cites·30 claims
- 4184US12053800B1Compression apparatuses, systems and methods for screening materialsDERRICK CORP·Filed 2023·Granted Aug 6, 2024·0 cites·30 claims
- 4284US11938516B1Compression apparatuses, systems and methods for screening materialsDERRICK CORP·Filed 2023·Granted Mar 26, 2024·0 cites·30 claims
- 4384US9914153B2Method and apparatuses for screeningDERRICK CORP·Filed 2016·Granted Mar 13, 2018·2 cites·18 claims
- 4480US10363577B2Method and apparatuses for screeningDERRICK CORP·Filed 2018·Granted Jul 30, 2019·1 cites·16 claims
- 4580US6220448B1Screen assembly for vibratory screening machineDERRICK MFG CORP·Filed 1997·Granted Apr 24, 2001·41 cites·24 claims
- 4679US12042822B2Injection molded screening apparatuses and methodsDERRICK CORP·Filed 2023·Granted Jul 23, 2024·0 cites·20 claims
- 4779US9144825B2Method and apparatuses for screeningDERRICK CORP·Filed 2012·Granted Sep 29, 2015·4 cites·10 claims
- 4879US5673797AScreen assembly for vibratory screening machine and method of fabrication thereofDERRICK MFG CORP·Filed 1995·Granted Oct 7, 1997·38 cites·35 claims
- 4978US2022112359A1Thermoplastic compositions, methods, apparatus, and usesDERRICK CORP·Filed 2021·Application pending·0 cites
- 5077US9199279B2Method and apparatuses for screeningDERRICK CORP·Filed 2012·Granted Dec 1, 2015·3 cites·29 claims
Showing the top 50 of 62 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Keith Wojciechowski files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →