Sheet manufacturing apparatus
US-2018355556-A1 · Dec 13, 2018 · US
Complete machines for making continuous webs of paper
Complete machines for making continuous webs of paper · Cooperative Patent Classification (CPC)
Textile and paper production, treatment, and products.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | D21F9/00 |
| Official title | Complete machines for making continuous webs of paper |
| Display label | Complete machines for making continuous webs of paper |
| Total patents | 389 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 17 |
| 2016 | 24 |
| 2017 | 13 |
| 2018 | 23 |
| 2019 | 35 |
| 2020 | 33 |
| 2021 | 61 |
| 2022 | 46 |
| 2023 | 45 |
| 2024 | 41 |
| 2025 | 40 |
| 2026 | 11 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Sheet manufacturing apparatus and sheet manufacturing method
US-10105882-B2 · Oct 23, 2018 · US
Sheet manufacturing apparatus
US-10100466-B2 · Oct 16, 2018 · US
Production line for producing fiber webs and a cooler
US-10094067-B2 · Oct 9, 2018 · US
Sheet manufacturing apparatus
US-9982391-B2 · May 29, 2018 · US
Sheet manufacturing apparatus
US-9951473-B2 · Apr 24, 2018 · US
Sheet manufacturing apparatus and sheet manufacturing method
US-9849634-B2 · Dec 26, 2017 · US
Sheet manufacturing apparatus and sheet manufacturing method
US-9840023-B2 · Dec 12, 2017 · US
Sheet manufacturing apparatus
US-2017350073-A1 · Dec 7, 2017 · US
Sheet manufacturing apparatus
US-2017335516-A1 · Nov 23, 2017 · US
Sheet manufacturing apparatus, and sheet manufacturing method
US-2017312996-A1 · Nov 2, 2017 · US
Sheet manufacturing apparatus and sheet manufacturing method
US-9790642-B2 · Oct 17, 2017 · US
Production Line for Producing Fiber Webs and a Cooler
US-2017292221-A1 · Oct 12, 2017 · US
Sheet manufacturing apparatus, sheet manufacturing method, and sheet
US-9776365-B2 · Oct 3, 2017 · US
Sheet manufacturing apparatus
US-9776213-B2 · Oct 3, 2017 · US
Sheet manufacturing apparatus and sheet manufacturing method
US-9771685-B2 · Sep 26, 2017 · US
Sheet manufacturing apparatus and sheet manufacturing method
US-2017260691-A1 · Sep 14, 2017 · US
Sheet manufacturing apparatus and sheet manufacturing method
US-2017203478-A1 · Jul 20, 2017 · US
Sheet manufacturing apparatus and sheet manufacturing method
US-9662810-B2 · May 30, 2017 · US
Sheet manufacturing apparatus and sheet manufacturing method
US-9498896-B2 · Nov 22, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21F9/00?
- CPC D21F9/00 is the Cooperative Patent Classification code for “Complete machines for making continuous webs of paper.”
- How many patents are filed under CPC D21F9/00 (Complete machines for making continuous webs of paper)?
- Our database includes 389 publications tagged with this CPC code.
- Is patent activity under CPC D21F9/00 growing?
- Publication counts under this code: 41 in 2024 vs 40 in 2025 (latest complete years).