Topological rotary engine
US-2022307413-A1 · Sep 29, 2022 · US
Outer members for co-operation with rotary pistons; Casings
Outer members for co-operation with rotary pistons; Casings · 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 | F02B55/08 |
| Official title | Outer members for co-operation with rotary pistons; Casings |
| Display label | Outer members for co-operation with rotary pistons; Casings |
| Total patents | 95 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 6 |
| 2017 | 4 |
| 2018 | 13 |
| 2019 | 4 |
| 2020 | 13 |
| 2021 | 15 |
| 2022 | 9 |
| 2023 | 8 |
| 2024 | 7 |
| 2025 | 10 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Rotary engine lubrication system using intensifier injector
US-2021355898-A1 · Nov 18, 2021 · US
Rotary engine lubrication system using intensifier injector
US-11174732-B1 · Nov 16, 2021 · US
Rotary internal combustion engine
US-11143098-B1 · Oct 12, 2021 · US
Fuel injection system for aircraft engine
US-11111848-B1 · Sep 7, 2021 · US
Rotary internal combustion engine with seal lubrication
US-2021231033-A1 · Jul 29, 2021 · US
Rotary piston engine
US-2021164387-A1 · Jun 3, 2021 · US
Method of apex seal lubrication for a rotary internal combustion engine
US-11008909-B2 · May 18, 2021 · US
Method of manufacturing a rotary engine casing
US-10995660-B2 · May 4, 2021 · US
Rotary piston engine
US-10982592-B2 · Apr 20, 2021 · US
Method of combusting fuel in a rotary internal combustion engine with pilot subchamber and ignition element
US-10968820-B2 · Apr 6, 2021 · US
Rotary engine
US-10954848-B2 · Mar 23, 2021 · US
Piston assembly for an internal combustion engine of a motor vehicle
US-2021062916-A1 · Mar 4, 2021 · US
Rotary engine
US-2021054872-A1 · Feb 25, 2021 · US
Internal combustion engine with a rotating piston and uni-directional rolling bear
US-10890110-B2 · Jan 12, 2021 · US
Rotary engine
US-2021003011-A1 · Jan 7, 2021 · US
Rotary internal combustion engine with pilot subchamber
US-10697365-B2 · Jun 30, 2020 · US
Rotary internal combustion engine with apex seal lubrication
US-2020157985-A1 · May 21, 2020 · US
Motor housings and motor assemblies with controlled radial thermal expansion
US-10637321-B1 · Apr 28, 2020 · US
Rotary internal combustion engine with unequal volumetric ratios
US-2020123970-A1 · Apr 23, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02B55/08?
- CPC F02B55/08 is the Cooperative Patent Classification code for “Outer members for co-operation with rotary pistons; Casings.”
- How many patents are filed under CPC F02B55/08 (Outer members for co-operation with rotary pistons; Casings)?
- Our database includes 95 publications tagged with this CPC code.
- Is patent activity under CPC F02B55/08 growing?
- Publication counts under this code: 7 in 2024 vs 10 in 2025 (latest complete years).