- All sections
- B - Performing operations; transporting
- B23F - Making gears or toothed racks
- B23F 21/22 - Face-mills for longitudinally-curved gear teeth
Patent holdings for IPC class B23F 21/22
Total number of patents in this class: 39
10-year publication summary
|
5
|
3
|
4
|
5
|
3
|
1
|
0
|
0
|
0
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| The Gleason Works | 202 |
23 |
| Klingelnberg AG | 74 |
5 |
| Cole Carbide Industries, Inc. | 3 |
2 |
| Klingelnberg GmbH | 54 |
2 |
| Sandvik Intellectual Property AB | 1634 |
2 |
| Ford Motor Company | 2817 |
1 |
| Aisin Seiki Kabushiki Kaisha | 2427 |
1 |
| Kennametal Inc. | 1380 |
1 |
| Dana Automotive Systems Group, LLC | 395 |
1 |
| Gleason Cutting Tools Corporation | 10 |
1 |
| Other owners | 0 |