Heat transfer pipe, heat exchanger, pipe expanding tool, pipe expanding device, method for connecting heat transfer pipe and pipe, and method for manufacturing heat exchanger
US-2025271218-A1 · Aug 28, 2025 · US
circumferential seams, e.g. of shells
circumferential seams, e.g. of shells · 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 | B23K1/18 |
| Official title | circumferential seams, e.g. of shells |
| Display label | circumferential seams, e.g. of shells |
| Total patents | 55 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 5 |
| 2017 | 9 |
| 2018 | 9 |
| 2019 | 4 |
| 2020 | 11 |
| 2021 | 1 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 4 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Brazing system, brazing method, and program
US-2025205798-A1 · Jun 26, 2025 · US
Joint member, method for producing joint member, and method for connecting flexible tube to joint member
US-12098791-B2 · Sep 24, 2024 · US
Refrigeration apparatus and refrigerant pipe of the same refrigeration apparatus
US-12055328-B2 · Aug 6, 2024 · US
Joint member, method for producing joint member, and method for connecting flexible tube to joint member
US-2024102591-A1 · Mar 28, 2024 · US
Connecting element for a pipe arrangement and arrangement
US-11920702-B2 · Mar 5, 2024 · US
Apparatuses and methods for induction heating
US-11845137-B2 · Dec 19, 2023 · US
Joined component
US-11460061-B2 · Oct 4, 2022 · US
Refrigeration apparatus and refrigerant pipe of the same refrigeration apparatus
US-2022146161-A1 · May 12, 2022 · US
Joined component
US-2021033124-A1 · Feb 4, 2021 · US
Brazing components and techniques
US-10858997-B2 · Dec 8, 2020 · US
Method for connecting at least two components of an endoscope, component of an endoscope and endoscope
US-10842353-B2 · Nov 24, 2020 · US
Nuclear reactor fuel rod and fuel assembly having bundled same
US-10796807-B2 · Oct 6, 2020 · US
Joined component and method for manufacturing joined component
US-10788069-B2 · Sep 29, 2020 · US
Refrigerant pipe, method of manufacturing the refrigerant pipe, and heat exchanger including the refrigerant pipe
US-10697568-B2 · Jun 30, 2020 · US
Manufacturing method of three-dimensional heat conducting structure
US-10697710-B2 · Jun 30, 2020 · US
Ceramic-metal structure
US-10639736-B2 · May 5, 2020 · US
Apparatuses and methods for induction heating
US-2020114446-A1 · Apr 16, 2020 · US
Sinter-brazed component
US-10603732-B2 · Mar 31, 2020 · US
Laser welding of copper with reaction materials
US-10576565-B2 · Mar 3, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B23K1/18?
- CPC B23K1/18 is the Cooperative Patent Classification code for “circumferential seams, e.g. of shells.”
- How many patents are filed under CPC B23K1/18 (circumferential seams, e.g. of shells)?
- Our database includes 55 publications tagged with this CPC code.
- Is patent activity under CPC B23K1/18 growing?
- Publication counts under this code: 4 in 2024 vs 2 in 2025 (latest complete years).