Metasurface element, electron tube, and method for producing electron tube
US-12400821-B2 · Aug 26, 2025 · US
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Secondary-electron-emitting electrodes (H01J1/35 takes precedence)
Secondary-electron-emitting electrodes (H01J1/35 takes precedence) · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01J1/32 |
| Official title | Secondary-electron-emitting electrodes (H01J1/35 takes precedence) |
| Display label | Secondary-electron-emitting electrodes (H01J1/35 takes precedence) |
| Total patents | 21 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2017 | 1 |
| 2019 | 9 |
| 2020 | 6 |
| 2021 | 2 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Metasurface element, electron tube, and method for producing electron tube
US-2024021398-A1 · Jan 18, 2024 · US
Method of enhancing a DLC coated surface for enhanced multipaction resistance
US-11183390-B2 · Nov 23, 2021 · US
Electron multiplier production method and electron multiplier
US-10957522-B2 · Mar 23, 2021 · US
Enhanced electron amplifier structure and method of fabricating the enhanced electron amplifier structure
US-10867768-B2 · Dec 15, 2020 · US
3D printed micro channel plate, method of making and using 3D printed micro channel plate
US-10796874-B2 · Oct 6, 2020 · US
Wafer scale image intensifier
US-10734184-B1 · Aug 4, 2020 · US
Metal encapsulated photocathode electron emitter
US-10714295-B2 · Jul 14, 2020 · US
Metal encapsulated photocathode electron emitter
US-2020090895-A1 · Mar 19, 2020 · US
Electron multiplier production method and electron multiplier
US-2020058477-A1 · Feb 20, 2020 · US
Electron multiplier production method and electron multiplier
US-10522334-B2 · Dec 31, 2019 · US
3d printed micro channel plate, method of making and using 3d printed micro channel plate
US-2019318896-A1 · Oct 17, 2019 · US
3D printed micro channel plate, method of making and using 3D printed micro channel plate
US-10403464-B2 · Sep 3, 2019 · US
Image intensifier with stray particle shield
US-10332732-B1 · Jun 25, 2019 · US
Method of enhancing a dlc coated surface for enhanced multipaction resistance
US-2019181013-A1 · Jun 13, 2019 · US
Passive local area saturation of electron bombarded gain
US-10312047-B1 · Jun 4, 2019 · US
Electron multiplier production method and electron multiplier
US-2019164734-A1 · May 30, 2019 · US
3d printed micro channel plate, method of making and using 3d printed micro channel plate
US-2019096623-A1 · Mar 28, 2019 · US
Enhanced electron amplifier structure and method of fabricating the enhanced electron amplifier structure
US-2019066961-A1 · Feb 28, 2019 · US
Transmission mode photocathode
US-9824844-B2 · Nov 21, 2017 · US