UAV Rotor System
US-2018354612-A1 · Dec 13, 2018 · US
Skis or runners
Skis or runners · 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 | B64C25/52 |
| Official title | Skis or runners |
| Display label | Skis or runners |
| Total patents | 187 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 12 |
| 2016 | 16 |
| 2017 | 23 |
| 2018 | 25 |
| 2019 | 23 |
| 2020 | 28 |
| 2021 | 15 |
| 2022 | 19 |
| 2023 | 7 |
| 2024 | 10 |
| 2025 | 7 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Aerial vehicle
US-2018354613-A1 · Dec 13, 2018 · US
Foldable multi-rotor aerial vehicle
US-2018327092-A1 · Nov 15, 2018 · US
Helicopter skid landing gear
US-9994308-B2 · Jun 12, 2018 · US
Methods and apparatus to wirelessly power an unmanned aerial vehicle
US-2018095468-A1 · Apr 5, 2018 · US
Skid landing gear having at least one damper, and aircraft including the skid landing gear
US-9926074-B2 · Mar 27, 2018 · US
Vertical takeoff and landing vehicle with increased cruise efficiency
US-9896200-B2 · Feb 20, 2018 · US
Aerial vehicle and a signal line protection assembly thereof
US-9896195-B2 · Feb 20, 2018 · US
Unmanned aerial vehicles, charging systems for the same and methods of charging the same
US-2018044015-A1 · Feb 15, 2018 · US
Rotary wing aircraft with a fuselage and a non-retractable skid-type landing gear
US-2017369159-A1 · Dec 28, 2017 · US
Drone
US-2017355453-A1 · Dec 14, 2017 · US
Emergency Landing Stability System for Aircraft
US-2017297682-A1 · Oct 19, 2017 · US
Drone with folding linking arms
US-2017247098-A1 · Aug 31, 2017 · US
Multi-position landing gear
US-9731816-B2 · Aug 15, 2017 · US
Landing platform for an unmanned aerial vehicle
US-2017217323-A1 · Aug 3, 2017 · US
Uav with transformable arms
US-2017217571-A1 · Aug 3, 2017 · US
Rotorcraft and assembly and disassembly structure for foot stand and airframe of rotorcraft
US-2017217570-A1 · Aug 3, 2017 · US
Rotorcraft and heat dissipation structure for motor
US-2017217599-A1 · Aug 3, 2017 · US
Rotorcraft and connecting structure for arm and airframe of rotorcraft
US-2017217559-A1 · Aug 3, 2017 · US
In-flight reconfigurable aircraft tail
US-2017190412-A1 · Jul 6, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B64C25/52?
- CPC B64C25/52 is the Cooperative Patent Classification code for “Skis or runners.”
- How many patents are filed under CPC B64C25/52 (Skis or runners)?
- Our database includes 187 publications tagged with this CPC code.
- Is patent activity under CPC B64C25/52 growing?
- Publication counts under this code: 10 in 2024 vs 7 in 2025 (latest complete years).