Rotary engine
US-11459891-B2 · Oct 4, 2022 · US
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with one or more pistons in the form of a disk or rotor rotating with relation to the housing; with annular working chamber
with one or more pistons in the form of a disk or rotor rotating with relation to the housing; with annular working chamber · 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 | F02B2730/01 |
| Official title | with one or more pistons in the form of a disk or rotor rotating with relation to the housing; with annular working chamber |
| Display label | with one or more pistons in the form of a disk or rotor rotating with relation to the housing; with annular working chamber |
| Total patents | 5 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity appears to be declining based on the most recent years.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2020 | 1 |
| 2021 | 2 |
| 2022 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Rotary piston engine
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Rotary engine
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Rotary piston engine
US-2020025063-A1 · Jan 23, 2020 · US
Rotary piston engine
US-8936004-B1 · Jan 20, 2015 · US