Four stroke engine, handheld work apparatus having a four stroke engine, and method for operating a four stroke engine
US-11168593-B2 · Nov 9, 2021 · US
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Four-stroke engines characterised by having crankcase pumps
Four-stroke engines characterised by having crankcase pumps · 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 | F02B33/26 |
| Official title | Four-stroke engines characterised by having crankcase pumps |
| Display label | Four-stroke engines characterised by having crankcase pumps |
| Total patents | 4 |
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 |
|---|---|
| 2019 | 1 |
| 2020 | 2 |
| 2021 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.