Coil springs, pocketed coil springs assemblies, and mattresses including the same
US-2026036181-A1 · Feb 5, 2026 · US
characterised by varying pitch
characterised by varying pitch · 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 | F16F1/047 |
| Official title | {characterised by varying pitch} |
| Display label | characterised by varying pitch |
| Total patents | 60 |
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 | 4 |
| 2016 | 3 |
| 2017 | 11 |
| 2018 | 8 |
| 2019 | 6 |
| 2020 | 9 |
| 2021 | 7 |
| 2022 | 3 |
| 2023 | 4 |
| 2024 | 2 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Twisted valve spring
US-12404786-B2 · Sep 2, 2025 · US
Coil springs, pocketed coil springs assemblies, and mattresses including the same
US-2025172183-A1 · May 29, 2025 · US
Method for determining propelling condition for shot medium, and method for manufacturing coil spring
US-12097591-B2 · Sep 24, 2024 · US
Twisted valve spring
US-2024191641-A1 · Jun 13, 2024 · US
Filtering pulley
US-11815172-B2 · Nov 14, 2023 · US
Coil spring
US-11719298-B2 · Aug 8, 2023 · US
Helical spring for a pump having an adjustable delivery volume
US-11592021-B2 · Feb 28, 2023 · US
Method for determining propelling condition for shot medium, and method for manufacturing coil spring
US-2023016208-A1 · Jan 19, 2023 · US
Coil spring
US-11499600-B2 · Nov 15, 2022 · US
Torsional vibration damper having a helical spring assembly
US-2022252132-A1 · Aug 11, 2022 · US
Helical spring for a pump having an adjustable delivery volume
US-2022065248-A1 · Mar 3, 2022 · US
Coil spring
US-11181160-B2 · Nov 23, 2021 · US
Coil spring
US-2021324930-A1 · Oct 21, 2021 · US
Coil spring
US-11131356-B2 · Sep 28, 2021 · US
Coil spring
US-2021190162-A1 · Jun 24, 2021 · US
Coil spring
US-2021190163-A1 · Jun 24, 2021 · US
Coil spring
US-10995811-B2 · May 4, 2021 · US
Coil springs with non-linear loading responses and mattresses including the same
US-10935098-B2 · Mar 2, 2021 · US
Drive device and pump device
US-10808783-B2 · Oct 20, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16F1/047?
- CPC F16F1/047 is the Cooperative Patent Classification code for “characterised by varying pitch.”
- How many patents are filed under CPC F16F1/047 (characterised by varying pitch)?
- Our database includes 60 publications tagged with this CPC code.
- Is patent activity under CPC F16F1/047 growing?
- Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).