Method of manufacturing a stainless steel sheet
US-2026015684-A1 · Jan 15, 2026 · US
for knives, scythes, scissors, or like hand cutting tools
for knives, scythes, scissors, or like hand cutting tools · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C21D9/18 |
| Official title | for knives, scythes, scissors, or like hand cutting tools |
| Display label | for knives, scythes, scissors, or like hand cutting tools |
| Total patents | 32 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 8 |
| 2017 | 2 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 4 |
| 2021 | 3 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Razor blade and composition for a razor blade
US-12240136-B2 · Mar 4, 2025 · US
Method for manufacturing steel strip for blade, and steel strip for blade
US-12195821-B2 · Jan 14, 2025 · US
Process for obtaining a fine-grained martensitic structure component
US-2024271239-A1 · Aug 15, 2024 · US
Martensitic stainless steel sheet having excellent corrosion resistance and method for manufacturing same, and martensitic stainless bladed product
US-2024158879-A1 · May 16, 2024 · US
Martensite-based stainless steel material and method for producing same
US-2023357906-A1 · Nov 9, 2023 · US
Stainless steel sheet and method of manufacturing same, edged tool, and cutlery
US-2023212705-A1 · Jul 6, 2023 · US
Manufacturing method of a cutting member
US-11577303-B2 · Feb 14, 2023 · US
Steel for knives, steel for martensitic knives, knife, and production method for steel for martensitic knives
US-2022340988-A1 · Oct 27, 2022 · US
Razor blade and composition for a razor blade
US-2022250266-A1 · Aug 11, 2022 · US
Blade material
US-11306370-B2 · Apr 19, 2022 · US
Cutting blade for an agricultural implement, and method of manufacturing the same
US-11060176-B2 · Jul 13, 2021 · US
Tool steel having strength and high impact toughness
US-11008634-B2 · May 18, 2021 · US
Cutting blade for an agricultural implement, and method of manufacturing the same
US-2021123127-A1 · Apr 29, 2021 · US
Variable heat-treat endodontic file
US-10716645-B2 · Jul 21, 2020 · US
Super-high-strength tool steel having high impact toughness and method of manufacturing the same
US-2020102622-A1 · Apr 2, 2020 · US
Method for manufacturing steel strip for blade, and steel strip for blade
US-2020071790-A1 · Mar 5, 2020 · US
Tool with cutting edge and method of manufacturing it
US-2020061747-A1 · Feb 27, 2020 · US
Blade material
US-2019211418-A1 · Jul 11, 2019 · US
Cutting member and manufacturing method thereof
US-2019160521-A1 · May 30, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D9/18?
- CPC C21D9/18 is the Cooperative Patent Classification code for “for knives, scythes, scissors, or like hand cutting tools.”
- How many patents are filed under CPC C21D9/18 (for knives, scythes, scissors, or like hand cutting tools)?
- Our database includes 32 publications tagged with this CPC code.
- Is patent activity under CPC C21D9/18 growing?
- Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).