- All sections
- B - Performing operations; transporting
- B23B - Turning; boring
- B23B 31/20 - Longitudinally-split sleeves, e.g. collet chucks
Patent holdings for IPC class B23B 31/20
Total number of patents in this class: 333
10-year publication summary
|
25
|
40
|
30
|
39
|
42
|
30
|
28
|
12
|
20
|
2
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Franz Haimer Maschinenbau KG | 144 |
27 |
| Kennametal Inc. | 1380 |
14 |
| Iscar, Ltd. | 1084 |
12 |
| Star Micronics Co., Ltd. | 266 |
11 |
| Robert Bosch GmbH | 40953 |
9 |
| Haimer GmbH | 73 |
9 |
| Hainbuch GmbH Spannende Technik | 40 |
9 |
| Schaublin SA | 39 |
9 |
| Black & Decker, Inc. | 2402 |
8 |
| Rego-Fix AG | 35 |
7 |
| Shin-yain Industrial Co., Ltd. | 21 |
6 |
| Gyrus ACMI, Inc. | 1071 |
5 |
| GSI Group Limited | 32 |
5 |
| Big Daishowa Co., Ltd. | 84 |
5 |
| Albrecht Präzision GmbH & Co. KG | 11 |
4 |
| ANCA Pty Ltd | 43 |
4 |
| citizen Watch Co., Ltd. | 1062 |
4 |
| Schunk GmbH & Co. KG Spann- und Greiftechnik | 111 |
4 |
| Dine Inc. | 9 |
4 |
| JBS System GmbH | 4 |
4 |
| Other owners | 173 |