Heat exchanger for friction stir welding apparatus and associated system and method
US-12377490-B2 · Aug 5, 2025 · US
Rotary drums or rollers
Rotary drums or rollers · 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 | F28F5/02 |
| Official title | Rotary drums or rollers |
| Display label | Rotary drums or rollers |
| Total patents | 34 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 3 |
| 2017 | 4 |
| 2018 | 6 |
| 2019 | 1 |
| 2020 | 5 |
| 2021 | 4 |
| 2022 | 5 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Rotary reactor
US-2025186942-A1 · Jun 12, 2025 · US
Heat exchanger for friction stir welding apparatus and associated system and method
US-2025083249-A1 · Mar 13, 2025 · US
Rotatable heat exchanger for a gas turbine engine
US-2024369107-A1 · Nov 7, 2024 · US
Method of forming a roll body or roll mantle
US-11766714-B2 · Sep 26, 2023 · US
Roll mantle, roll body and method of forming same
US-2022143683-A1 · May 12, 2022 · US
Heat sink assembly for electronic equipment
US-11300363-B2 · Apr 12, 2022 · US
Multitubular rotary heat exchanger
US-11300357-B2 · Apr 12, 2022 · US
Roll mantle, roll body and method of forming same
US-11285530-B2 · Mar 29, 2022 · US
Heat sink assembly for electronic equipment
US-2022011056-A1 · Jan 13, 2022 · US
Latent heat storage device
US-11060800-B2 · Jul 13, 2021 · US
Fuser assemblies
US-11047630-B2 · Jun 29, 2021 · US
Roll mantle, roll body and method of forming same
US-2021078069-A1 · Mar 18, 2021 · US
Multitubular rotary heat exchanger
US-2021048254-A1 · Feb 18, 2021 · US
Heat treatment apparatus for a vacuum chamber, deposition apparatus for depositing material on a flexible substrate, method of heat treatment of a flexible substrate in a vacuum chamber, and method for processing a flexible substrate
US-2020131627-A1 · Apr 30, 2020 · US
Fuser assemblies
US-2020116441-A1 · Apr 16, 2020 · US
Heat transport device and projection image display device
US-2020109899-A1 · Apr 9, 2020 · US
Rotating heat exchanger with tube coil
US-2020025456-A1 · Jan 23, 2020 · US
Fuser assemblies
US-10539376-B2 · Jan 21, 2020 · US
Latent heat storage device
US-2019186844-A1 · Jun 20, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F28F5/02?
- CPC F28F5/02 is the Cooperative Patent Classification code for “Rotary drums or rollers.”
- How many patents are filed under CPC F28F5/02 (Rotary drums or rollers)?
- Our database includes 34 publications tagged with this CPC code.
- Is patent activity under CPC F28F5/02 growing?
- Publication counts under this code: 1 in 2024 vs 3 in 2025 (latest complete years).