Battery can trimming apparatus and method
US-2026061476-A1 · Mar 5, 2026 · US
in tubes or other hollow bodies
in tubes or other hollow bodies · 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 | B21D28/28 |
| Official title | in tubes or other hollow bodies |
| Display label | in tubes or other hollow bodies |
| Total patents | 46 |
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 | 7 |
| 2016 | 3 |
| 2017 | 5 |
| 2018 | 5 |
| 2019 | 8 |
| 2020 | 5 |
| 2021 | 4 |
| 2022 | 1 |
| 2023 | 3 |
| 2024 | 3 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Device and system for laying and inserting variable holes in irrigation tubing
US-2025178061-A1 · Jun 5, 2025 · US
Apparatus for fastening a functional element to a section of a workpiece
US-12117034-B2 · Oct 15, 2024 · US
Trimming device and method for rectangular container, and rectangular container
US-2024326141-A1 · Oct 3, 2024 · US
Punch set for electrical box
US-12046886-B2 · Jul 23, 2024 · US
Stator and method of producing the same
US-11658532-B2 · May 23, 2023 · US
Apparatus for Fastening a Functional Element to a Section of a Workpiece
US-2023110968-A1 · Apr 13, 2023 · US
Forming method and forming apparatus
US-11583907-B2 · Feb 21, 2023 · US
Coaxial connector and method for producing the outer contact of the same
US-11223169-B2 · Jan 11, 2022 · US
Hole widening method, forming tool, and formed product
US-11192161-B2 · Dec 7, 2021 · US
Punching mold device capable of rotating a workpiece and punching method using thereof
US-11084081-B2 · Aug 10, 2021 · US
Stator and method of producing the same
US-2021083539-A1 · Mar 18, 2021 · US
Air conditioner and method of manufacturing the same
US-10941989-B2 · Mar 9, 2021 · US
Beverage can having a grommet
US-10865036-B2 · Dec 15, 2020 · US
Coaxial connector and method for producing the outer contact of the same
US-2020366039-A1 · Nov 19, 2020 · US
Method of forming a speaker housing
US-10820130-B2 · Oct 27, 2020 · US
Forming method and forming apparatus
US-2020188978-A1 · Jun 18, 2020 · US
Burring method and burring apparatus
US-10562091-B2 · Feb 18, 2020 · US
Method of manufacturing piston of pump for brake system and pump for brake system including the piston
US-10507501-B2 · Dec 17, 2019 · US
Punching Mold Device Capable Of Rotating A Workpiece And Punching Method Using Thereof
US-2019374993-A1 · Dec 12, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B21D28/28?
- CPC B21D28/28 is the Cooperative Patent Classification code for “in tubes or other hollow bodies.”
- How many patents are filed under CPC B21D28/28 (in tubes or other hollow bodies)?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC B21D28/28 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).