- All sections
- B - Performing operationstransporting
- B23F - Making gears or toothed racks
- B23F 21/12 - Milling tools
Patent holdings for IPC class B23F 21/12
Total number of patents in this class: 76
10-year publication summary
|
6
|
9
|
6
|
6
|
7
|
5
|
4
|
7
|
5
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| The Gleason Works | 201 |
11 |
| Profilator GmbH & Co. KG | 63 |
6 |
| American Axle & Manufacturing, Inc. | 657 |
5 |
| Gleason-Pfauter Maschinenfabrik GmbH | 91 |
5 |
| Hartmetall-Werkzeugfabrik Paul Horn GmbH | 157 |
5 |
| JTEKT Corporation | 2452 |
4 |
| Klingelnberg AG | 75 |
4 |
| Prawema Antriebstechnik GmbH | 34 |
3 |
| Aisin Seiki Kabushiki Kaisha | 2283 |
2 |
| Liebherr-Verzahntechnik GmbH | 69 |
2 |
| OSG Corporation | 360 |
2 |
| Sandvik Intellectual Property AB | 1540 |
2 |
| Tungaloy Corporation | 496 |
2 |
| Adelbert Haas GmbH | 34 |
2 |
| Ford Motor Company | 2729 |
1 |
| Kennametal Inc. | 1392 |
1 |
| citizen Machinery Co., Ltd. | 186 |
1 |
| citizen Watch Co., Ltd. | 1071 |
1 |
| Fairfield Manufacturing Company, Inc. | 43 |
1 |
| Felsomat GmbH & Co. KG | 49 |
1 |
| Other owners | 15 |