Subsea Processing of Well Fluids
US-2018371888-A1 · Dec 27, 2018 · US
Multi-channel pipes or pipe assemblies
Multi-channel pipes or pipe assemblies · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F16L9/19 |
| Official title | Multi-channel pipes or pipe assemblies |
| Display label | Multi-channel pipes or pipe assemblies |
| Total patents | 155 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 13 |
| 2016 | 15 |
| 2017 | 20 |
| 2018 | 21 |
| 2019 | 21 |
| 2020 | 15 |
| 2021 | 12 |
| 2022 | 10 |
| 2023 | 8 |
| 2024 | 13 |
| 2025 | 6 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Chemical dispense system with reduced contamination
US-10161545-B2 · Dec 25, 2018 · US
Environmental control system pack with an air supply manifold
US-2018273186-A1 · Sep 27, 2018 · US
Double wall tube fitting with an integrated diagnostic port
US-10066774-B2 · Sep 4, 2018 · US
Propeller transfer tube
US-2018141639-A1 · May 24, 2018 · US
Fuel manifold and fuel injector arrangement
US-9932903-B2 · Apr 3, 2018 · US
Double-walled pipe
US-2018080582-A1 · Mar 22, 2018 · US
Piping system with leak detection
US-2018066773-A1 · Mar 8, 2018 · US
Automotive pipe
US-2018056777-A1 · Mar 1, 2018 · US
Subsea Pipe-in-Pipe Structures
US-2018031164-A1 · Feb 1, 2018 · US
Thermally-coupled fuel manifold
US-9874351-B2 · Jan 23, 2018 · US
Connections for subsea pipe-in-pipe structures
US-9857011-B2 · Jan 2, 2018 · US
Foolproofing system for pipes by means of an obstacle inside a connector in an aircraft duct
US-9840335-B2 · Dec 12, 2017 · US
Shrouded pipe
US-2017335997-A1 · Nov 23, 2017 · US
Heating and cooling system
US-2017336154-A1 · Nov 23, 2017 · US
Shrouded pipe
US-2017336007-A1 · Nov 23, 2017 · US
Connector with double lumen tube
US-9797528-B2 · Oct 24, 2017 · US
Tube module
US-9791074-B2 · Oct 17, 2017 · US
Double skinned pipe assembly
US-2017254445-A1 · Sep 7, 2017 · US
Method for the production of a tubular member, and tubular member
US-2017254443-A1 · Sep 7, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16L9/19?
- CPC F16L9/19 is the Cooperative Patent Classification code for “Multi-channel pipes or pipe assemblies.”
- How many patents are filed under CPC F16L9/19 (Multi-channel pipes or pipe assemblies)?
- Our database includes 155 publications tagged with this CPC code.
- Is patent activity under CPC F16L9/19 growing?
- Publication counts under this code: 13 in 2024 vs 6 in 2025 (latest complete years).