- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F41A - Functional features or details common to both smallarms and ordnance, e.g. cannons; mountings for smallarms or ordnance
- F41A 21/28 - Gas-expansion chambers; Barrels provided with gas-relieving ports
Patent holdings for IPC class F41A 21/28
Total number of patents in this class: 78
10-year publication summary
7
|
19
|
9
|
21
|
22
|
19
|
8
|
10
|
15
|
1
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Sturm, Ruger & Company, Inc. | 284 |
8 |
REM TML Holdings, LLC | 80 |
4 |
Roundhill Group, LLC | 47 |
4 |
Desert Leasing & Licensing LLC | 30 |
3 |
Kgmade LLC | 14 |
3 |
The United States of America as represented by the Secretary of the Army | 1195 |
2 |
BAE SYSTEMS plc | 2215 |
2 |
Delta P Design, Inc. | 6 |
2 |
FM Products, Inc. | 22 |
2 |
WHG Properties, LLC | 284 |
2 |
Hailey Ordnance Company | 5 |
2 |
American Classic Arms, LLC | 7 |
2 |
True Velocity IP Holdings, LLC | 255 |
2 |
Brevex S.A. | 3 |
2 |
Maxim Defense Industries, LLC | 12 |
2 |
Forward Defense Munitions, Co. | 3 |
2 |
Eight Holdings LLC | 12 |
2 |
Raytheon Company | 8535 |
1 |
Thales SA | 2318 |
1 |
Battelle Memorial Institute | 2356 |
1 |
Other owners | 29 |