Apparatus, system, and method for forming metal parts
US-2019337040-A1 · Nov 7, 2019 · US
of the surface
of the surface · 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 | C21D7/04 |
| Official title | of the surface |
| Display label | of the surface |
| Total patents | 147 |
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 | 5 |
| 2017 | 12 |
| 2018 | 20 |
| 2019 | 16 |
| 2020 | 13 |
| 2021 | 9 |
| 2022 | 15 |
| 2023 | 17 |
| 2024 | 17 |
| 2025 | 5 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Water jet peening device
US-10376942-B2 · Aug 13, 2019 · US
Laser processing apparatus and laser processing method
US-10329641-B2 · Jun 25, 2019 · US
Method for manufacturing core plate
US-2019149021-A1 · May 16, 2019 · US
Repair of components using additive manufacturing with in-situ cold working
US-2019128144-A1 · May 2, 2019 · US
Process for forming a stainless steel weldment resistant to stress corrosion cracking
US-2019062857-A1 · Feb 28, 2019 · US
Solid-State Welding of Coarse Grain Powder Metallurgy Nickel-Based Superalloys
US-2018371594-A1 · Dec 27, 2018 · US
Pneumatic needling device
US-10131963-B2 · Nov 20, 2018 · US
Apparatus for producing compressive residual stress in balls
US-10118274-B2 · Nov 6, 2018 · US
Deformed part and vehicle
US-10119187-B2 · Nov 6, 2018 · US
Method of making a dual hardness steel article
US-10113211-B2 · Oct 30, 2018 · US
Clad steel plate with excellent thermal conductivity
US-2018304326-A1 · Oct 25, 2018 · US
Multiaxial vibration-peening system
US-10105815-B2 · Oct 23, 2018 · US
Metal sheet with a ZnAl coating
US-10041162-B2 · Aug 7, 2018 · US
Method for Manufacturing a Component of Austenitic TWIP or TRIP/TWIP Steel
US-2018207695-A1 · Jul 26, 2018 · US
Alloy steel in which carburization is prevented by processing load and method of manufacturing the same
US-2018187295-A1 · Jul 5, 2018 · US
Steel pipe for fuel injection pipe and method for producing the same
US-2018171426-A1 · Jun 21, 2018 · US
Method of reversing surface stress on a coated component
US-2018133851-A1 · May 17, 2018 · US
Treated tapered article and method of treatment for a tapered article
US-2018134370-A1 · May 17, 2018 · US
Device for performing strengthening treatment on tooth root of gear
US-2018099327-A1 · Apr 12, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D7/04?
- CPC C21D7/04 is the Cooperative Patent Classification code for “of the surface.”
- How many patents are filed under CPC C21D7/04 (of the surface)?
- Our database includes 147 publications tagged with this CPC code.
- Is patent activity under CPC C21D7/04 growing?
- Publication counts under this code: 17 in 2024 vs 5 in 2025 (latest complete years).