Device and method for continuously producing an at least partly hollow shaft having a varying inner and/or outer diameter
US-12502705-B2 · Dec 23, 2025 · US
Making tubes with varying diameter in longitudinal direction
Making tubes with varying diameter in longitudinal direction · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B21C37/16 |
| Official title | Making tubes with varying diameter in longitudinal direction |
| Display label | Making tubes with varying diameter in longitudinal direction |
| Total patents | 58 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 3 |
| 2017 | 5 |
| 2018 | 4 |
| 2019 | 3 |
| 2020 | 5 |
| 2021 | 7 |
| 2022 | 5 |
| 2023 | 10 |
| 2024 | 7 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Additive manufacturing of multilayered structures
US-2025326197-A1 · Oct 23, 2025 · US
Expanded tube for a motor vehicle crash box and manufacturing method for it
US-12391201-B2 · Aug 19, 2025 · US
Manufacturing method of member, manufacturing method of member for vehicle, and die and punch
US-12179249-B2 · Dec 31, 2024 · US
Overlapping and progressive forming method for high-performance multi-element NiAl-based alloy tubular part
US-12172203-B2 · Dec 24, 2024 · US
Pipe for chromatograph and method of manufacturing pipe for chromatograph
US-2024319149-A1 · Sep 26, 2024 · US
Hollow shaft
US-12083571-B2 · Sep 10, 2024 · US
Method for manufacturing torsion beam
US-12036600-B2 · Jul 16, 2024 · US
Device and method for continuously producing an at least partly hollow shaft having a varying inner and/or outer diameter
US-2024181515-A1 · Jun 6, 2024 · US
Variable thickness extrusion for variable extrudate product properties
US-2024082896-A1 · Mar 14, 2024 · US
Method of manufacturing orifice
US-11815056-B2 · Nov 14, 2023 · US
Molding system
US-2023321713-A1 · Oct 12, 2023 · US
Process for the production of thin-walled hollow profiles which are composed of nonferrous metals and have small diameters
US-11772144-B2 · Oct 3, 2023 · US
Forming method of nickel aluminum alloy tubular part with micro flow channels
US-11724298-B1 · Aug 15, 2023 · US
Method of manufacturing two tubes simultaneously and machine for use therein
US-11697143-B2 · Jul 11, 2023 · US
Rolling-bulging forming hydraulic machine for tubular products
US-11679426-B2 · Jun 20, 2023 · US
Overlapping and progressive forming method for high-performance multi-element nial-based alloy tubular part
US-2023182188-A1 · Jun 15, 2023 · US
Expanded tube for a motor vehicle crash box and manufacturing method for it
US-2023060627-A1 · Mar 2, 2023 · US
Method of manufacturing variable wall thickness steel pipe and variable wall thickness steel pipe
US-11590547-B2 · Feb 28, 2023 · US
Methods, systems, apparatus, and articles of manufacture to crimp a tube
US-2023031457-A1 · Feb 2, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B21C37/16?
- CPC B21C37/16 is the Cooperative Patent Classification code for “Making tubes with varying diameter in longitudinal direction.”
- How many patents are filed under CPC B21C37/16 (Making tubes with varying diameter in longitudinal direction)?
- Our database includes 58 publications tagged with this CPC code.
- Is patent activity under CPC B21C37/16 growing?
- Publication counts under this code: 7 in 2024 vs 3 in 2025 (latest complete years).