Differential buoyancy steering
US-2026091862-A1 · Apr 2, 2026 · US
by hydrofoils
by hydrofoils · 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 | B63G8/18 |
| Official title | by hydrofoils |
| Display label | by hydrofoils |
| Total patents | 44 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 3 |
| 2017 | 1 |
| 2018 | 3 |
| 2019 | 3 |
| 2020 | 5 |
| 2021 | 5 |
| 2022 | 3 |
| 2023 | 7 |
| 2024 | 6 |
| 2025 | 4 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Rapid replacement control fin for an underwater vehicle
US-12565296-B2 · Mar 3, 2026 · US
Field configurable autonomous vehicle
US-12454338-B1 · Oct 28, 2025 · US
Bionic rescue robot fish
US-2025236371-A1 · Jul 24, 2025 · US
Field configurable autonomous airplane
US-2025206423-A1 · Jun 26, 2025 · US
Underwater helicopter with cycloidal rim vector propulsion
US-2025115342-A1 · Apr 10, 2025 · US
Shape memory alloy variable buoyance engine
US-2024308634-A1 · Sep 19, 2024 · US
Hybrid aquatic unmanned aerial and submersible vehicle
US-12037095-B2 · Jul 16, 2024 · US
Rapid replacement control fin for an underwater vehicle
US-2024217638-A1 · Jul 4, 2024 · US
Underwater camera system
US-2024061321-A1 · Feb 22, 2024 · US
Drive mechanism for control surface actuation
US-11892275-B2 · Feb 6, 2024 · US
Bi-directional foil system for towed marine cable array
US-11878771-B2 · Jan 23, 2024 · US
Heave survey platform
US-11834141-B1 · Dec 5, 2023 · US
Drive mechanism for control surface actuation
US-2023384069-A1 · Nov 30, 2023 · US
Method and system for hierarchical disturbance rejection depth tracking control of underactuated underwater vehicle
US-11809201-B1 · Nov 7, 2023 · US
Drop weight buoyancy system for underwater gliders
US-11655012-B2 · May 23, 2023 · US
Retractable control fins for underwater vehicles
US-11597485-B2 · Mar 7, 2023 · US
Drop weight buoyancy system for underwater gliders
US-2023041341-A1 · Feb 9, 2023 · US
Fluid medium vehicle
US-11554841-B1 · Jan 17, 2023 · US
Towfish with reversible variable hydrodynamic lift and towing line comprising the towfish
US-11396348-B2 · Jul 26, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B63G8/18?
- CPC B63G8/18 is the Cooperative Patent Classification code for “by hydrofoils.”
- How many patents are filed under CPC B63G8/18 (by hydrofoils)?
- Our database includes 44 publications tagged with this CPC code.
- Is patent activity under CPC B63G8/18 growing?
- Publication counts under this code: 6 in 2024 vs 4 in 2025 (latest complete years).