- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F16L - Pipes; joints or fittings for pipes; supports for pipes, cables or protective tubing; means for thermal insulation in general
- F16L 21/04 - Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members
Patent holdings for IPC class F16L 21/04
Total number of patents in this class: 219
10-year publication summary
26
|
16
|
21
|
17
|
20
|
20
|
18
|
19
|
18
|
3
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Kubota Corporation | 3054 |
26 |
Mueller International, LLC | 694 |
23 |
Georg Fischer WAGA N.V. | 16 |
11 |
Romac Industries, Inc. | 44 |
7 |
Poulton Technologies Limited | 14 |
6 |
Crane Limited | 44 |
4 |
Dionex Softron GmbH | 110 |
4 |
E. Hawle Armaturenwerke GmbH | 22 |
4 |
Waterworks Technology Development Organization Co., Ltd. | 41 |
4 |
Cambridge Brass, Inc. | 14 |
3 |
LenLok Holdings, LLC | 28 |
3 |
SK-KAWANISHI Co., Ltd. | 11 |
3 |
Quick Fitting Holding Company, LLC | 93 |
3 |
Denso Corporation | 23338 |
2 |
Daikin Industries, Ltd. | 9495 |
2 |
Shimadzu Corporation | 5791 |
2 |
Freudenberg Oil & Gas, LLC | 48 |
2 |
Higashio Mech Co., Ltd. | 14 |
2 |
Lokring Technology, LLC | 36 |
2 |
Mirai Industry Co., Ltd. | 5 |
2 |
Other owners | 104 |