Electron gun
US-2025232940-A1 · Jul 17, 2025 · US
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Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes
Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01J29/488 |
| Official title | {Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes} |
| Display label | Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes |
| Total patents | 16 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2017 | 1 |
| 2018 | 2 |
| 2020 | 2 |
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Electron gun
US-12272514-B2 · Apr 8, 2025 · US
Electron gun
US-2024006142-A1 · Jan 4, 2024 · US
Electron photoinjector
US-11562874-B2 · Jan 24, 2023 · US
Cathode mechanism of electron gun, electron gun, and electron beam writing apparatus
US-11430628-B1 · Aug 30, 2022 · US
Cathode mechanism of electron gun, electron gun, and electron beam writing apparatus
US-2022270842-A1 · Aug 25, 2022 · US
Electron photoinjector
US-2021398768-A1 · Dec 23, 2021 · US
Electron photoinjector
US-11031206-B2 · Jun 8, 2021 · US
Electron gun and apparatus incorporating the same
US-10916399-B1 · Feb 9, 2021 · US
Combination of an X-ray tube and a source grating with electron beam manipulation
US-10722201-B2 · Jul 28, 2020 · US
Electron photoinjector
US-2020083014-A1 · Mar 12, 2020 · US
X-ray tube including hybrid electron emission source
US-10147581-B2 · Dec 4, 2018 · US
Combination of an x-ray tube and a source grating with electron beam manipulation
US-2018192981-A1 · Jul 12, 2018 · US
X-ray tube including hybrid electron emission source
US-2017213685-A1 · Jul 27, 2017 · US
Field emission X-ray tube and method of focusing electron beam using the same
US-9105437-B2 · Aug 11, 2015 · US
Compact high-voltage electron gun
US-8957394-B2 · Feb 17, 2015 · US