- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F28F - Details of heat-exchange or heat-transfer apparatus, of general application
- F28F 11/04 - Arrangements for sealing leaky tubes or conduits using pairs of obturating elements, e.g. washers, mounted upon central operating rods
Patent holdings for IPC class F28F 11/04
Total number of patents in this class: 14
10-year publication summary
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1
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1
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0
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1
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1
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1
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0
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2
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0
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0
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13953 |
5 |
| Aramco Services Company | 4161 |
3 |
| Alfa Laval Olmi S.p.A | 22 |
1 |
| F.f. Seeley Nominees Pty. Ltd. | 12 |
1 |
| 20 Emma 20 S.L. | 11 |
1 |
| HEGAIN 2100 Consulting S.L. | 14 |
1 |
| Seong SIM L&d Co., Ltd | 1 |
1 |
| FBM Hudson Italiana S.p.A. | 1 |
1 |
| Other owners | 0 |