Diagnostic system and method for detecting leaks and disconnects in a crankcase ventilation system
US-10876447-B1 · Dec 29, 2020 · US
by means of additional source of positive or negative pressure
by means of additional source of positive or negative pressure · 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 | F01M13/02 |
| Official title | by means of additional source of positive or negative pressure |
| Display label | by means of additional source of positive or negative pressure |
| Total patents | 90 |
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 | 14 |
| 2016 | 11 |
| 2017 | 6 |
| 2018 | 11 |
| 2019 | 5 |
| 2020 | 14 |
| 2021 | 8 |
| 2022 | 6 |
| 2023 | 5 |
| 2024 | 7 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method and system for crankcase ventilation monitor
US-10794244-B2 · Oct 6, 2020 · US
Turbocharger compressor housings
US-2020300123-A1 · Sep 24, 2020 · US
Abnormality assessment device of internal combustion engine
US-2020256225-A1 · Aug 13, 2020 · US
Abnormality determination device of internal combustion engine
US-2020256273-A1 · Aug 13, 2020 · US
Cylinder head cover structure for engine
US-10731601-B2 · Aug 4, 2020 · US
Method for crankcase ventilation in a boosted engine
US-10704477-B2 · Jul 7, 2020 · US
Oil mist separator
US-10683784-B2 · Jun 16, 2020 · US
Oil mist separator
US-2020157987-A1 · May 21, 2020 · US
Crankcase integrity breach detection
US-10619534-B2 · Apr 14, 2020 · US
Blow-by gas treating device
US-2020102863-A1 · Apr 2, 2020 · US
Side-channel blower for an internal combustion engine, comprising a wide interrupting gap
US-10605270-B2 · Mar 31, 2020 · US
Method for controlling a pressure in a crankcase
US-10544718-B2 · Jan 28, 2020 · US
Side-channel blower for an internal combustion engine
US-10443606-B2 · Oct 15, 2019 · US
Method for controlling a pressure in a crankcase
US-2019211721-A1 · Jul 11, 2019 · US
Blow-by gas processing device, and engine
US-2019186445-A1 · Jun 20, 2019 · US
Pump device for driving blow-by-gas
US-10253662-B2 · Apr 9, 2019 · US
Cylinder head cover structure for engine
US-2019017466-A1 · Jan 17, 2019 · US
Crankcase ventilation for turbocharged engine
US-10145277-B2 · Dec 4, 2018 · US
Method for crankcase ventilation in a boosted engine
US-2018334974-A1 · Nov 22, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01M13/02?
- CPC F01M13/02 is the Cooperative Patent Classification code for “by means of additional source of positive or negative pressure.”
- How many patents are filed under CPC F01M13/02 (by means of additional source of positive or negative pressure)?
- Our database includes 90 publications tagged with this CPC code.
- Is patent activity under CPC F01M13/02 growing?
- Publication counts under this code: 7 in 2024 vs 3 in 2025 (latest complete years).