Engine
US-12535031-B2 · Jan 27, 2026 · US
using pressure in working cylinder or crankcase to operate lubricant feeding devices
using pressure in working cylinder or crankcase to operate lubricant feeding devices · 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 | F01M1/04 |
| Official title | using pressure in working cylinder or crankcase to operate lubricant feeding devices |
| Display label | using pressure in working cylinder or crankcase to operate lubricant feeding devices |
| Total patents | 52 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 4 |
| 2017 | 5 |
| 2018 | 6 |
| 2019 | 9 |
| 2020 | 8 |
| 2021 | 7 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Active control of gearbox case pressure
US-2025334078-A1 · Oct 30, 2025 · US
Engine
US-2024376842-A1 · Nov 14, 2024 · US
Internal combustion engine and oil treatment apparatus for use with the same
US-11808182-B2 · Nov 7, 2023 · US
Internal combustion engine and oil treatment apparatus for use with the same
US-2023036530-A1 · Feb 2, 2023 · US
Internal combustion engine and oil treatment apparatus for use with the same
US-11499452-B2 · Nov 15, 2022 · US
Engine assembly
US-11459918-B2 · Oct 4, 2022 · US
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
Turbocharger for an internal combustion engine
US-11131242-B2 · Sep 28, 2021 · US
Engine assembly
US-2021293163-A1 · Sep 23, 2021 · US
Oil passageway structure for internal combustion engines
US-11008908-B2 · May 18, 2021 · US
Internal combustion engine and oil treatment apparatus for use with the same
US-2021062693-A1 · Mar 4, 2021 · US
In-vehicle internal combustion engine
US-10914208-B2 · Feb 9, 2021 · US
Turbocharger for an internal combustion engine
US-2021010420-A1 · Jan 14, 2021 · US
Gerotor-type oil pump
US-2020408117-A1 · Dec 31, 2020 · US
Internal combustion engine and oil treatment apparatus for use with the same
US-10858971-B2 · Dec 8, 2020 · US
Mixture-lubricated four-stroke engine
US-10801396-B2 · Oct 13, 2020 · US
Replaceable fluid container
US-10683139-B2 · Jun 16, 2020 · US
Four stroke engine, handheld work apparatus having a four stroke engine, and method for operating a four stroke engine
US-2020173319-A1 · Jun 4, 2020 · US
Internal combustion engine
US-10634020-B2 · Apr 28, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01M1/04?
- CPC F01M1/04 is the Cooperative Patent Classification code for “using pressure in working cylinder or crankcase to operate lubricant feeding devices.”
- How many patents are filed under CPC F01M1/04 (using pressure in working cylinder or crankcase to operate lubricant feeding devices)?
- Our database includes 52 publications tagged with this CPC code.
- Is patent activity under CPC F01M1/04 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).