Ventilation drag reduction device and marine ventilation drag reduction system including same
US-12589833-B2 · Mar 31, 2026 · US
using air bubbles or air layers {gas filled volumes (waterborne vessels travelling on air cushions B60V3/06)}
using air bubbles or air layers {gas filled volumes (waterborne vessels travelling on air cushions B60V3/06)} · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B63B1/38 |
| Official title | using air bubbles or air layers {gas filled volumes (waterborne vessels travelling on air cushions B60V3/06)} |
| Display label | using air bubbles or air layers {gas filled volumes (waterborne vessels travelling on air cushions B60V3/06)} |
| Total patents | 32 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 5 |
| 2019 | 4 |
| 2020 | 4 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 2 |
| 2024 | 5 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Fluid entrapment via perforated surfaces for drag reduction
US-12459603-B2 · Nov 4, 2025 · US
Method of forming a microstructured surface
US-12365585-B2 · Jul 22, 2025 · US
Cavitation load-reduction device for underwater vehicle having adjustable water entry angle
US-2024246637-A1 · Jul 25, 2024 · US
Combined disc-type cavitation structure for underwater navigation of underwater vehicle
US-2024182137-A1 · Jun 6, 2024 · US
Adjustable cavitator structure having double layer retractable sheet
US-2024149980-A1 · May 9, 2024 · US
Jet-propelled water-entry composite buffer device for multi-channel gas recycling
US-2024034437-A1 · Feb 1, 2024 · US
Device and method for gas maintenance in microfeatures on a submerged surface
US-2024018980-A1 · Jan 18, 2024 · US
Ventilation drug reduction device and marine ventilation drug reduction system including same
US-2023348022-A1 · Nov 2, 2023 · US
Air layer and hydrophobic drag reduction and preferential guidance and recovery of gas with engineered surfaces
US-11780533-B2 · Oct 10, 2023 · US
Electric current supply system, designed to be at least partially submerged in an electrically conductive liquid during operation thereof
US-11324085-B2 · May 3, 2022 · US
Air layer and hydrophobic drag reduction and preferential guidance and recovery of gas with engineered surfaces
US-2021309321-A1 · Oct 7, 2021 · US
An electric current supply system, designed to be at least partially submerged in an electrically conductive liquid during operation thereof
US-2020325585-A1 · Oct 15, 2020 · US
Systems, methods, and apparatuses for reducing hydrodynamic frictional drag
US-10787231-B2 · Sep 29, 2020 · US
Frictional resistance-reducing device and ship including same
US-10562593-B2 · Feb 18, 2020 · US
Rudder assembly
US-10562594-B2 · Feb 18, 2020 · US
Cavitator system for suppressing cavity buoyancy effect and method thereof
US-10486773-B2 · Nov 26, 2019 · US
Cavitator system for suppressing cavity buoyancy effect and method thereof
US-2019322335-A1 · Oct 24, 2019 · US
Frictional resistance-reducing device and ship including same
US-10266230-B2 · Apr 23, 2019 · US
Rudder assembly
US-2019009861-A1 · Jan 10, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B63B1/38?
- CPC B63B1/38 is the Cooperative Patent Classification code for “using air bubbles or air layers {gas filled volumes (waterborne vessels travelling on air cushions B60V3/06)}.”
- How many patents are filed under CPC B63B1/38 (using air bubbles or air layers {gas filled volumes (waterborne vessels travelling on air cushions B60V3/06)})?
- Our database includes 32 publications tagged with this CPC code.
- Is patent activity under CPC B63B1/38 growing?
- Publication counts under this code: 5 in 2024 vs 2 in 2025 (latest complete years).