- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F16F - Springs; shock-absorbers; means for damping vibration
- F16F 1/393 - Springs made of material having high internal friction with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin with spherical or conical sleeves
Patent holdings for IPC class F16F 1/393
Total number of patents in this class: 48
10-year publication summary
|
7
|
6
|
3
|
3
|
4
|
5
|
4
|
0
|
1
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ZF Friedrichshafen AG | 6820 |
5 |
| Bell Helicopter Textron Inc. | 1122 |
4 |
| Toyo Tire Corporation | 943 |
3 |
| Aktiebolaget SKF | 2700 |
2 |
| Anvis Deutschland GmbH | 21 |
2 |
| ContiTech Vibration Control GmbH | 101 |
2 |
| FM Energie GmbH & Co. KG | 19 |
2 |
| FM Energie GmbH & Co.KG | 21 |
2 |
| Hutchinson | 455 |
2 |
| Sikorsky Aircraft Corporation | 1150 |
2 |
| Raytheon Company | 8535 |
1 |
| aeris GmbH | 91 |
1 |
| Audi AG | 7153 |
1 |
| ContiTech Luftfedersysteme GmbH | 112 |
1 |
| Diversified Machine, Inc. | 3 |
1 |
| Hendrickson USA, L.L.C. | 603 |
1 |
| Iljin.co.ltd. | 28 |
1 |
| ITT Manufacturing Enterprises, Inc. | 230 |
1 |
| Lord Corporation | 484 |
1 |
| Nordic Windpower Limited | 2 |
1 |
| Other owners | 12 |