Pipe expanding tool
US-12576441-B2 · Mar 17, 2026 · US
by means of mandrels
by means of mandrels · 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 | B21D41/026 |
| Official title | {by means of mandrels} |
| Display label | by means of mandrels |
| Total patents | 55 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 3 |
| 2017 | 5 |
| 2018 | 10 |
| 2019 | 8 |
| 2020 | 6 |
| 2021 | 6 |
| 2022 | 6 |
| 2023 | 4 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Tapered cup and method of forming the same
US-12370594-B2 · Jul 29, 2025 · US
Method for manufacturing heat exchanger
US-2025205836-A1 · Jun 26, 2025 · US
Hollow member and hollow member manufacturing method
US-2025187061-A1 · Jun 12, 2025 · US
Method and apparatus for can expansion
US-11724302-B2 · Aug 15, 2023 · US
Swage tool
US-11717876-B2 · Aug 8, 2023 · US
Bend pipe and method for manufacturing same
US-11712727-B2 · Aug 1, 2023 · US
Pipe expanding tool
US-2023141074-A1 · May 11, 2023 · US
Method for expanding an end of a pipe and expander tool
US-11529666-B2 · Dec 20, 2022 · US
Method and apparatus for can expansion
US-2022203430-A1 · Jun 30, 2022 · US
Tapered cup and method of forming the same
US-2022134405-A1 · May 5, 2022 · US
Diamond coating on the cone for expandable tubulars
US-2022134410-A1 · May 5, 2022 · US
Full-electric servo vertical three-counter-roller driving power spinning device
US-11292045-B2 · Apr 5, 2022 · US
Method and apparatus for can expansion
US-11253904-B2 · Feb 22, 2022 · US
Mechanical processing of high aspect ratio metallic tubing and related technology
US-11125360-B2 · Sep 21, 2021 · US
Swage tool
US-2021154725-A1 · May 27, 2021 · US
Bend pipe and method for manufacturing same
US-2021121929-A1 · Apr 29, 2021 · US
Swage tool
US-10940521-B2 · Mar 9, 2021 · US
Telescopic Suspension Fork Leg and Telescopic Fork Provided Therewith
US-2021039740-A1 · Feb 11, 2021 · US
Full-electric servo vertical three-counter-roller driving power spinning device
US-2021023602-A1 · Jan 28, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B21D41/026?
- CPC B21D41/026 is the Cooperative Patent Classification code for “by means of mandrels.”
- How many patents are filed under CPC B21D41/026 (by means of mandrels)?
- Our database includes 55 publications tagged with this CPC code.
- Is patent activity under CPC B21D41/026 growing?
- Publication counts under this code: 4 in 2023 vs 3 in 2025 (latest complete years).