Internal combustion engines with unidirectional compounding drives
US-10850860-B1 · Dec 1, 2020 · US
of parallel type
of parallel type · 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 | B64D35/025 |
| Official title | of parallel type |
| Display label | of parallel type |
| Total patents | 260 |
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 | 4 |
| 2017 | 5 |
| 2018 | 16 |
| 2019 | 10 |
| 2020 | 30 |
| 2021 | 24 |
| 2022 | 23 |
| 2023 | 37 |
| 2024 | 52 |
| 2025 | 43 |
| 2026 | 14 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hybrid-electric drive system
US-10837304-B2 · Nov 17, 2020 · US
Operation of a hybrid electric aircraft propulsion system
US-10826415-B2 · Nov 3, 2020 · US
Control systems for hybrid electric powerplants
US-2020339268-A1 · Oct 29, 2020 · US
Method of optimizing the noise generated in flight by a rotorcraft
US-2020309045-A1 · Oct 1, 2020 · US
Electric power system for powerplants of a multi-engine aircraft
US-2020307813-A1 · Oct 1, 2020 · US
System for redundant supply of kinetic energy to drive system of aircraft
US-10787271-B2 · Sep 29, 2020 · US
Propulsion system for an aircraft
US-2020290745-A1 · Sep 17, 2020 · US
Aircraft propulsion system having hybrid-electric powerplant and combustion powerplant
US-2020277874-A1 · Sep 3, 2020 · US
Distributed propulsion configurations for aircraft having mixed drive systems
US-2020277065-A1 · Sep 3, 2020 · US
Normal mode operation of hybrid electric propulsion systems
US-2020277063-A1 · Sep 3, 2020 · US
Degraded mode operation of hybrid electric propulsion systems
US-2020277064-A1 · Sep 3, 2020 · US
Hybrid-electric propulsion system for an aircraft
US-10762726-B2 · Sep 1, 2020 · US
Bli propulsion system with three aft propulsion units
US-2020216182-A1 · Jul 9, 2020 · US
Propulsion system for an aircraft
US-10676199-B2 · Jun 9, 2020 · US
Hybrid-electric propulsion system for an aircraft
US-10633104-B2 · Apr 28, 2020 · US
Hybrid electric propulsion system and method of operation
US-2020079518-A1 · Mar 12, 2020 · US
Synchronization of generator and electric motor in a hybrid electric aircraft propulsion system
US-2020079521-A1 · Mar 12, 2020 · US
Hybrid electric propulsion system and method of operation
US-2020083791-A1 · Mar 12, 2020 · US
Hybrid electric aircraft propulsion system and method
US-2020079514-A1 · Mar 12, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B64D35/025?
- CPC B64D35/025 is the Cooperative Patent Classification code for “of parallel type.”
- How many patents are filed under CPC B64D35/025 (of parallel type)?
- Our database includes 260 publications tagged with this CPC code.
- Is patent activity under CPC B64D35/025 growing?
- Publication counts under this code: 52 in 2024 vs 43 in 2025 (latest complete years).