Retainer for the Processing of Optical Workpieces, Particularly Spectacle Lenses
US-2024351157-A1 · Oct 24, 2024 · US
Working surfaces curved in two directions
Working surfaces curved in two directions · 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 | B23C3/16 |
| Official title | Working surfaces curved in two directions |
| Display label | Working surfaces curved in two directions |
| Total patents | 75 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 3 |
| 2017 | 4 |
| 2018 | 5 |
| 2019 | 6 |
| 2020 | 6 |
| 2021 | 12 |
| 2022 | 8 |
| 2023 | 10 |
| 2024 | 9 |
| 2025 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for providing a dental prosthesis and a positioning guide for placing the dental prosthesis
US-11813126-B2 · Nov 14, 2023 · US
Firearm muzzle brake
US-11774206-B2 · Oct 3, 2023 · US
Dental milling machine
US-11752563-B2 · Sep 12, 2023 · US
Blank holder and blank
US-2023158584-A1 · May 25, 2023 · US
Machining method and machined product
US-2023158582-A1 · May 25, 2023 · US
Machining system and machining apparatus, machining method, and machining program
US-2023158581-A1 · May 25, 2023 · US
Dental machining system for generating process parameters of the machining
US-2023111090-A1 · Apr 13, 2023 · US
Cutting tool and method for machining workpiece
US-2023088133-A1 · Mar 23, 2023 · US
Firearm muzzle brake
US-2023032661-A1 · Feb 2, 2023 · US
Variable-frequency ultrasonic machining system for computer numerical control milling machine
US-11554512-B2 · Jan 17, 2023 · US
Method of machining a dental block for manufacturing a dental restoration
US-2022354624-A1 · Nov 10, 2022 · US
High speed multi-axis machine tool
US-2022339716-A1 · Oct 27, 2022 · US
Scarf repair apparatus, system, and method
US-11460830-B2 · Oct 4, 2022 · US
Surface precision defect shaver
US-11426805-B2 · Aug 30, 2022 · US
Method for numerical control milling, forming and polishing of large-diameter aspheric lens
US-2022179389-A1 · Jun 9, 2022 · US
Cutting apparatus and method for chamfering film stack using the same
US-2022072632-A1 · Mar 10, 2022 · US
Workpiece machining method and workpiece machining device
US-2022063040-A1 · Mar 3, 2022 · US
End mill
US-2022001466-A1 · Jan 6, 2022 · US
Method for producing an internal combustion engine
US-11207740-B2 · Dec 28, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B23C3/16?
- CPC B23C3/16 is the Cooperative Patent Classification code for “Working surfaces curved in two directions.”
- How many patents are filed under CPC B23C3/16 (Working surfaces curved in two directions)?
- Our database includes 75 publications tagged with this CPC code.
- Is patent activity under CPC B23C3/16 growing?
- Publication counts under this code: 9 in 2024 vs 7 in 2025 (latest complete years).