System and method for dispensing ground coffee
US-2026047722-A1 · Feb 19, 2026 · US
Main electrodes
Main electrodes · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01J1/02 |
| Official title | Main electrodes |
| Display label | Main electrodes |
| Total patents | 30 |
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 | 5 |
| 2016 | 2 |
| 2017 | 5 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 5 |
| 2022 | 3 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Electron source, manufacturing method therefor, and device comprising electron source
US-12293893-B2 · May 6, 2025 · US
Electron source, manufacturing method therefor, and device comprising electron source
US-2024347306-A1 · Oct 17, 2024 · US
Emitter, electron gun in which same is used, electronic device in which same is used, and method for manufacturing same
US-11915920-B2 · Feb 27, 2024 · US
Method and device for operating a liquid metal-ion source or liquid metal electron source as well as a liquid metal-ion source or liquid metal electron source
US-11705299-B2 · Jul 18, 2023 · US
Emitter, electron gun in which same is used, electronic device in which same is used, and method for manufacturing same
US-2022406552-A1 · Dec 22, 2022 · US
Arthropod detection
US-11523599-B2 · Dec 13, 2022 · US
Shaped repeller for an indirectly heated cathode ion source
US-11251010-B1 · Feb 15, 2022 · US
Method and device for operating a liquid metal-ion source or liquid metal electron source as well as a liquid metal-ion source or liquid metal electron source
US-2021383994-A1 · Dec 9, 2021 · US
Electrode for a discharge lamp, discharge lamp and method for producing an electrode
US-11164736-B2 · Nov 2, 2021 · US
Electron generating apparatus and ionization gauge
US-11069503-B2 · Jul 20, 2021 · US
Electron generating apparatus and ionization gauge
US-2021090840-A1 · Mar 25, 2021 · US
Electrode for a discharge lamp, discharge lamp and method for producing an electrode
US-2021050207-A1 · Feb 18, 2021 · US
Capacitors and radio frequency generators and other devices using them
US-10651020-B2 · May 12, 2020 · US
Arthropod detection
US-2019239498-A1 · Aug 8, 2019 · US
Interference management for adaptive TDD with frequency domain separations
US-10230517-B2 · Mar 12, 2019 · US
Electrode assemblies, plasma generating apparatuses, and methods for generating plasma
US-9997322-B2 · Jun 12, 2018 · US
Capacitors and radio frequency generators and other devices using them
US-2018144922-A1 · May 24, 2018 · US
Interference management for adaptive TDD with frequency domain separations
US-9768943-B2 · Sep 19, 2017 · US
Electron emission device
US-9685295-B2 · Jun 20, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01J1/02?
- CPC H01J1/02 is the Cooperative Patent Classification code for “Main electrodes.”
- How many patents are filed under CPC H01J1/02 (Main electrodes)?
- Our database includes 30 publications tagged with this CPC code.
- Is patent activity under CPC H01J1/02 growing?
- Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).