Electronic device, deposition apparatus and method for manufacturing display device by using the same
US-2026082861-A1 · Mar 19, 2026 · US
using electric or magnetic means in the chuck
using electric or magnetic means in the chuck · 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 | B23B31/28 |
| Official title | using electric or magnetic means in the chuck |
| Display label | using electric or magnetic means in the chuck |
| Total patents | 57 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 10 |
| 2016 | 7 |
| 2017 | 5 |
| 2018 | 7 |
| 2019 | 8 |
| 2020 | 2 |
| 2021 | 5 |
| 2022 | 2 |
| 2023 | 4 |
| 2024 | 3 |
| 2025 | 2 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Machine tool, chuck gripping force detection method, and chuck fastening amount setting method
US-2026042154-A1 · Feb 12, 2026 · US
Modular workholding apparatus
US-12390982-B2 · Aug 19, 2025 · US
Clamping device for tool holder
US-12325077-B2 · Jun 10, 2025 · US
Electrostatic chuck with porous plug
US-12162111-B2 · Dec 10, 2024 · US
Mounting system for a grinding machine
US-12070804-B2 · Aug 27, 2024 · US
Electrostatic chuck with porous plug
US-2024051075-A1 · Feb 15, 2024 · US
Electrostatic chuck with porous plug
US-11794296-B2 · Oct 24, 2023 · US
Electrostatic chuck with porous plug
US-2023241731-A1 · Aug 3, 2023 · US
Clamping device for tool holder
US-2023146914-A1 · May 11, 2023 · US
Modular workholding apparatus
US-2023032640-A1 · Feb 2, 2023 · US
Modular workholding apparatus
US-11498133-B2 · Nov 15, 2022 · US
Quick-connect mixer impeller coupling
US-11351512-B2 · Jun 7, 2022 · US
Tool changer and tool change system
US-11207785-B2 · Dec 28, 2021 · US
Mounting system for a grinding machine
US-2021252608-A1 · Aug 19, 2021 · US
Wafer support device and method for removing lift pin therefrom
US-10998219-B2 · May 4, 2021 · US
Transfer apparatus using electrostatic attraction and transfer method using electrostatic attraction
US-10957934-B2 · Mar 23, 2021 · US
Tool changer and tool change system
US-2021078121-A1 · Mar 18, 2021 · US
Chuck
US-10632544-B2 · Apr 28, 2020 · US
Modular workholding apparatus
US-2020078871-A1 · Mar 12, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B23B31/28?
- CPC B23B31/28 is the Cooperative Patent Classification code for “using electric or magnetic means in the chuck.”
- How many patents are filed under CPC B23B31/28 (using electric or magnetic means in the chuck)?
- Our database includes 57 publications tagged with this CPC code.
- Is patent activity under CPC B23B31/28 growing?
- Publication counts under this code: 3 in 2024 vs 2 in 2025 (latest complete years).