Biaxial supporting device for rotary opposed piston engine
US-2022389861-A1 · Dec 8, 2022 · US
Shapes or constructions of combustion chambers
Shapes or constructions of combustion chambers · 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 | F02B55/14 |
| Official title | Shapes or constructions of combustion chambers |
| Display label | Shapes or constructions of combustion chambers |
| Total patents | 79 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 5 |
| 2017 | 5 |
| 2018 | 16 |
| 2019 | 4 |
| 2020 | 12 |
| 2021 | 9 |
| 2022 | 5 |
| 2023 | 6 |
| 2024 | 7 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Topological rotary engine
US-2022307413-A1 · Sep 29, 2022 · US
Rotary internal combustion engine with unequal volumetric ratios
US-11261781-B2 · Mar 1, 2022 · US
Compound engine system with rotary engine
US-11187146-B2 · Nov 30, 2021 · US
Rotary internal combustion engine
US-11143098-B1 · Oct 12, 2021 · US
Heat insulation coat, coated member, and method of manufacturing coated member
US-11047062-B2 · Jun 29, 2021 · US
Rotary piston engine
US-2021164387-A1 · Jun 3, 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
Internal combustion engine with a rotating piston and uni-directional rolling bear
US-10890110-B2 · Jan 12, 2021 · US
Heat insulation coat, coated member, and method of manufacturing coated member
US-2020370195-A1 · Nov 26, 2020 · US
Rotary engine with oil pump
US-10774646-B2 · Sep 15, 2020 · US
Piston drive device
US-2020271109-A1 · Aug 27, 2020 · US
Method and system for starting a turbocompounded engine
US-2020149467-A1 · May 14, 2020 · US
Rotary internal combustion engine with unequal volumetric ratios
US-2020123970-A1 · Apr 23, 2020 · US
Compound engine system with rotary engine
US-2020123971-A1 · Apr 23, 2020 · US
Rotary engine casing
US-2020040813-A1 · Feb 6, 2020 · US
Compound engine system with rotary engine
US-10544733-B2 · Jan 28, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02B55/14?
- CPC F02B55/14 is the Cooperative Patent Classification code for “Shapes or constructions of combustion chambers.”
- How many patents are filed under CPC F02B55/14 (Shapes or constructions of combustion chambers)?
- Our database includes 79 publications tagged with this CPC code.
- Is patent activity under CPC F02B55/14 growing?
- Publication counts under this code: 7 in 2024 vs 4 in 2025 (latest complete years).