- All sections
- B - Performing operations; transporting
- 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: 73
10-year publication summary
|
10
|
6
|
9
|
6
|
6
|
6
|
5
|
4
|
7
|
2
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| The Gleason Works | 202 |
11 |
| American Axle & Manufacturing, Inc. | 649 |
5 |
| Profilator GmbH & Co. KG | 64 |
5 |
| JTEKT Corporation | 2423 |
4 |
| Gleason-Pfauter Maschinenfabrik GmbH | 89 |
4 |
| Hartmetall-Werkzeugfabrik Paul Horn GmbH | 154 |
4 |
| Klingelnberg AG | 74 |
4 |
| Prawema Antriebstechnik GmbH | 34 |
3 |
| Sandvik Intellectual Property AB | 1634 |
3 |
| Aisin Seiki Kabushiki Kaisha | 2427 |
2 |
| Liebherr-Verzahntechnik GmbH | 72 |
2 |
| OSG Corporation | 355 |
2 |
| Tungaloy Corporation | 481 |
2 |
| Ford Motor Company | 2817 |
1 |
| Kennametal Inc. | 1380 |
1 |
| citizen Machinery Co., Ltd. | 176 |
1 |
| citizen Watch Co., Ltd. | 1062 |
1 |
| Fairfield Manufacturing Company, Inc. | 44 |
1 |
| Felsomat GmbH & Co. KG | 51 |
1 |
| Fette GmbH | 39 |
1 |
| Other owners | 15 |