Inventor · disambiguated record
James Matthew Underwood
Also filed as: UNDERWOOD JAMES M · UNDERWOOD JAMES MATTHEW
60 granted patents·13 pending applications·221 citations·filing 1995–2025
98Inventor score
Top patents by PatentIndex Score
73 records- 0198US11441859B2Hybrid ambidextrous receiverUNDERWOOD JAMES MATTHEW·Filed 2020·Granted Sep 13, 2022·19 cites·22 claims
- 0296US11543195B2Roller and bearing delayed firearm operating systemsUNDERWOOD JAMES MATTHEW·Filed 2021·Granted Jan 3, 2023·7 cites·22 claims
- 0396US11054202B1Magazine followerUNDERWOOD JAMES MATTHEW·Filed 2020·Granted Jul 6, 2021·9 cites·25 claims
- 0495US11421954B2Firearm operating systemUNDERWOOD JAMES MATTHEW·Filed 2020·Granted Aug 23, 2022·6 cites·22 claims
- 0595US9389033B1Polymer/composite firearms and a process for strengthening polymer/composite firearmsMEAN LLC·Filed 2016·Granted Jul 12, 2016·11 cites·17 claims
- 0694US11828550B2Polymer firearm receiverUNDERWOOD JAMES MATTHEW·Filed 2022·Granted Nov 28, 2023·4 cites·20 claims
- 0794US11725895B2Firearm operating systemUNDERWOOD JAMES MATTHEW·Filed 2022·Granted Aug 15, 2023·3 cites·20 claims
- 0894US11371789B2Roller delayed firearm operating systemUNDERWOOD JAMES MATTHEW·Filed 2020·Granted Jun 28, 2022·5 cites·25 claims
- 0994US9297599B2Polymer/composite firearms and a process for strengthening polymer/composite firearmsMEAN L L C·Filed 2013·Granted Mar 29, 2016·32 cites·15 claims
- 1093US11441870B2Forward brace assemblyUNDERWOOD JAMES MATTHEW·Filed 2020·Granted Sep 13, 2022·6 cites·25 claims
- 1192US11543196B2Monolithic upper receiver assemblyUNDERWOOD JAMES MATTHEW·Filed 2021·Granted Jan 3, 2023·4 cites·26 claims
- 1292US11466945B2Charging handle assembliesUNDERWOOD JAMES MATTHEW·Filed 2021·Granted Oct 11, 2022·4 cites·20 claims
- 1391US11781824B2Roller delayed firearm operating systemUNDERWOOD JAMES MATTHEW·Filed 2022·Granted Oct 10, 2023·3 cites·20 claims
- 1490US12146717B2Roller delayed firearm operating systemUNDERWOOD JAMES MATTHEW·Filed 2023·Granted Nov 19, 2024·2 cites·20 claims
- 1590US12140394B2Polymer firearm receiverUNDERWOOD JAMES MATTHEW·Filed 2023·Granted Nov 12, 2024·2 cites·20 claims
- 1689US12025391B2Roller and bearing delayed firearm operating systemsUNDERWOOD JAMES MATTHEW·Filed 2022·Granted Jul 2, 2024·2 cites·20 claims
- 1788USD1020966SFirearm receiverUNDERWOOD JAMES MATTHEW·Filed 2022·Granted Apr 2, 2024·9 cites·1 claims
- 1888US11927415B2Hybrid ambidextrous receiverUNDERWOOD JAMES MATTHEW·Filed 2022·Granted Mar 12, 2024·2 cites·21 claims
- 1988US10670360B2Hybrid molded firearm assembliesMEAN LLC·Filed 2017·Granted Jun 2, 2020·11 cites·20 claims
- 2087US11846476B2Ejector for firearmUNDERWOOD JAMES MATTHEW·Filed 2022·Granted Dec 19, 2023·2 cites·20 claims
- 2187US11280570B2Firearm operating mechanisms and bolt releaseUNDERWOOD JAMES MATTHEW·Filed 2020·Granted Mar 22, 2022·3 cites·17 claims
- 2287US10739095B2Firearm operating systemMEAN LLC·Filed 2016·Granted Aug 11, 2020·9 cites·27 claims
- 2386US11112197B2Pivot pinUNDERWOOD JAMES MATTHEW·Filed 2020·Granted Sep 7, 2021·3 cites·17 claims
- 2485US12241703B2Firearm operating systemUNDERWOOD JAMES MATTHEW·Filed 2023·Granted Mar 4, 2025·1 cites·18 claims
- 2584US11725902B2Folding stock assembliesUNDERWOOD JAMES MATTHEW·Filed 2021·Granted Aug 15, 2023·4 cites·20 claims
- 2683US10809028B2Magazine structure and insertUNDERWOOD JAMES MATTHEW·Filed 2019·Granted Oct 20, 2020·7 cites·24 claims
- 2781US12313373B2Handguard assemblyUNDERWOOD JAMES MATTHEW·Filed 2023·Granted May 27, 2025·1 cites·20 claims
- 2881US11970223B2Stand up vehicleUNDERWOOD JAMES MATTHEW·Filed 2020·Granted Apr 30, 2024·1 cites·16 claims
- 2981US11536530B2Hybrid molded firearm assembliesUNDERWOOD JAMES MATTHEW·Filed 2020·Granted Dec 27, 2022·2 cites·25 claims
- 3079US2025189250A1Firearm operating systemUNDERWOOD JAMES MATTHEW·Filed 2025·Application pending·0 cites
- 3179US2025264297A1Handguard assemblyUNDERWOOD JAMES MATTHEW·Filed 2025·Application pending·0 cites
- 3278US12141113B2Electronic threat assessment systemUNDERWOOD JAMES MATTHEW·Filed 2021·Granted Nov 12, 2024·1 cites·21 claims
- 3375US12253329B2HandguardUNDERWOOD JAMES MATTHEW·Filed 2021·Granted Mar 18, 2025·1 cites·20 claims
- 3475USD943702SFirearm receiverUNDERWOOD JAMES MATTHEW·Filed 2019·Granted Feb 15, 2022·11 cites·1 claims
- 3574US2025216173A1HandguardUNDERWOOD JAMES MATTHEW·Filed 2025·Application pending·0 cites
- 3673US11112194B2Firearm lockUNDERWOOD JAMES MATTHEW·Filed 2020·Granted Sep 7, 2021·1 cites·21 claims
- 3773US10598453B2Firearm loaderMEAN LLC·Filed 2017·Granted Mar 24, 2020·4 cites·20 claims
- 3871US11906263B2Folding stock assembliesUNDERWOOD JAMES MATTHEW·Filed 2021·Granted Feb 20, 2024·1 cites·21 claims
- 3970US12449214B2Hybrid ambidextrous receiverUNDERWOOD JAMES MATTHEW·Filed 2024·Granted Oct 21, 2025·0 cites·19 claims
- 4069US12460890B2Simulated trigger assembliesUNDERWOOD JAMES MATTHEW·Filed 2024·Granted Nov 4, 2025·0 cites·20 claims
- 4169US12305943B2Firearm operating mechanisms and bolt releaseUNDERWOOD JAMES MATTHEW·Filed 2023·Granted May 20, 2025·0 cites·20 claims
- 4268US12241700B2Ejector for firearmUNDERWOOD JAMES MATTHEW·Filed 2023·Granted Mar 4, 2025·0 cites·20 claims
- 4368US12140395B2Firearm loaderUNDERWOOD JAMES MATTHEW·Filed 2023·Granted Nov 12, 2024·0 cites·20 claims
- 4466US12050078B2Ratcheting magazine assemblyUNDERWOOD JAMES MATTHEW·Filed 2023·Granted Jul 30, 2024·0 cites·20 claims
- 4566US10852083B2Buffer extensionUNDERWOOD JAMES MATTHEW·Filed 2019·Granted Dec 1, 2020·3 cites·18 claims
- 4666US10830558B2Buttstock lock release lever pin assemblyUNDERWOOD JAMES MATTHEW·Filed 2019·Granted Nov 10, 2020·3 cites·28 claims
- 4766US2025347484A1Firearm ejectorUNDERWOOD JAMES MATTHEW·Filed 2025·Application pending·0 cites
- 4865US12215942B2Hybrid molded firearm assembliesUNDERWOOD JAMES MATTHEW·Filed 2022·Granted Feb 4, 2025·0 cites·20 claims
- 4964US12460907B2Light weight ammunition and firearm systemsUNDERWOOD JAMES MATTHEW·Filed 2022·Granted Nov 4, 2025·0 cites·20 claims
- 5064US11067351B2Ratcheting magazine assemblyUNDERWOOD JAMES MATTHEW·Filed 2019·Granted Jul 20, 2021·2 cites·26 claims
Showing the top 50 of 73 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when James Matthew Underwood 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 →