Internal floating piston
US-2025376994-A1 · Dec 11, 2025 · US
Bearing surfaces
Bearing surfaces · 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 | F16J1/02 |
| Official title | Bearing surfaces |
| Display label | Bearing surfaces |
| Total patents | 47 |
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 | 1 |
| 2016 | 4 |
| 2017 | 5 |
| 2018 | 5 |
| 2019 | 3 |
| 2020 | 8 |
| 2021 | 11 |
| 2022 | 3 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Piston with a biaxial bearing for an opposed-piston engine
US-12442328-B2 · Oct 14, 2025 · US
Internal floating piston
US-12429074-B2 · Sep 30, 2025 · US
Internal floating piston
US-2025084876-A1 · Mar 13, 2025 · US
Piston with a biaxial bearing for an opposed-piston engine
US-2024191653-A1 · Jun 13, 2024 · US
Piston and a fluid-actuated working cylinder provided therewith
US-11821444-B2 · Nov 21, 2023 · US
Piston with a structured design
US-11668263-B2 · Jun 6, 2023 · US
Piston and a fluid-actuated working cylinder provided therewith
US-2022397132-A1 · Dec 15, 2022 · US
Piston with multiaxial bearing and piston bowl
US-11402020-B2 · Aug 2, 2022 · US
Piston for compressor
US-11384836-B2 · Jul 12, 2022 · US
Bearing assembly
US-11187269-B2 · Nov 30, 2021 · US
Piston-type positive displacement machine with a pressure-adaptive piston-cylinder interface
US-11118681-B2 · Sep 14, 2021 · US
Piston with multiaxial bearing and piston bowl
US-2021270367-A1 · Sep 2, 2021 · US
Piston for a heat engine, heat engine comprising such a piston, and methods
US-11098674-B2 · Aug 24, 2021 · US
Piston for compressor
US-2021180693-A1 · Jun 17, 2021 · US
A bearing assembly
US-2021131487-A1 · May 6, 2021 · US
Piston for a heat engine, heat engine comprising such a piston, and methods
US-2021123395-A1 · Apr 29, 2021 · US
Piston for internal combustion engine
US-10927787-B2 · Feb 23, 2021 · US
Sliding member, and sliding member for internal combustion engine
US-10927893-B2 · Feb 23, 2021 · US
Thermal actuator
US-2021048259-A1 · Feb 18, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16J1/02?
- CPC F16J1/02 is the Cooperative Patent Classification code for “Bearing surfaces.”
- How many patents are filed under CPC F16J1/02 (Bearing surfaces)?
- Our database includes 47 publications tagged with this CPC code.
- Is patent activity under CPC F16J1/02 growing?
- Publication counts under this code: 1 in 2024 vs 4 in 2025 (latest complete years).