Reciprocating pump
US-11519396-B2 · Dec 6, 2022 · US
Cylinder liners
Cylinder liners · 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 | F04B39/126 |
| Official title | {Cylinder liners} |
| Display label | Cylinder liners |
| Total patents | 91 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 4 |
| 2017 | 8 |
| 2018 | 10 |
| 2019 | 11 |
| 2020 | 12 |
| 2021 | 8 |
| 2022 | 11 |
| 2023 | 8 |
| 2024 | 2 |
| 2025 | 10 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Linear compressor
US-11204020-B2 · Dec 21, 2021 · US
Axial Piston-Type Hydraulic Rotary Machine
US-2021277891-A1 · Sep 9, 2021 · US
Linear compressor
US-2021246890-A1 · Aug 12, 2021 · US
Linear compressor
US-2021222915-A1 · Jul 22, 2021 · US
Linear compressor
US-2021123428-A1 · Apr 29, 2021 · US
Compressor
US-2021108837-A1 · Apr 15, 2021 · US
Linear compressor
US-2021095655-A1 · Apr 1, 2021 · US
Linear compressor
US-10890169-B2 · Jan 12, 2021 · US
Linear compressor
US-10876524-B2 · Dec 29, 2020 · US
Novel Reciprocating Pump
US-2020400132-A1 · Dec 24, 2020 · US
Linear motor and linear compressor having same
US-2020395836-A1 · Dec 17, 2020 · US
Reciprocating compressor having a gas bearing
US-10837434-B2 · Nov 17, 2020 · US
Reciprocating pump
US-10781803-B2 · Sep 22, 2020 · US
Linear compressor
US-2020263687-A1 · Aug 20, 2020 · US
Reciprocating compressor
US-10724512-B2 · Jul 28, 2020 · US
Linear compressor
US-2020149518-A1 · May 14, 2020 · US
Linear compressor
US-2020116138-A1 · Apr 16, 2020 · US
Linear compressor
US-2020088183-A1 · Mar 19, 2020 · US
Linear compressor
US-2020080553-A1 · Mar 12, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B39/126?
- CPC F04B39/126 is the Cooperative Patent Classification code for “Cylinder liners.”
- How many patents are filed under CPC F04B39/126 (Cylinder liners)?
- Our database includes 91 publications tagged with this CPC code.
- Is patent activity under CPC F04B39/126 growing?
- Publication counts under this code: 2 in 2024 vs 10 in 2025 (latest complete years).