Global shutter for transmission mode secondary electron intensifier by a low voltage signal
US-12183562-B2 · Dec 31, 2024 · US
Photo-emissive cathodes
Photo-emissive cathodes · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01J40/06 |
| Official title | Photo-emissive cathodes |
| Display label | Photo-emissive cathodes |
| Total patents | 66 |
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 |
| 2016 | 4 |
| 2017 | 6 |
| 2018 | 5 |
| 2019 | 7 |
| 2020 | 12 |
| 2021 | 5 |
| 2022 | 3 |
| 2023 | 8 |
| 2024 | 9 |
| 2025 | 4 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Photoelectron multiplying and collecting tube and imaging device using same
US-12176174-B2 · Dec 24, 2024 · US
Field-emission photocathodes for high-power high-frequency electronics
US-2024363320-A1 · Oct 31, 2024 · US
Photoelectric conversion device, electromagnetic wave detection device, photoelectric conversion method and electromagnetic wave detection method
US-2024363302-A1 · Oct 31, 2024 · US
Photoelectric conversion device and photoelectric conversion method
US-2024355572-A1 · Oct 24, 2024 · US
Photoelectric conversion device, electromagnetic wave detection device, photoelectric conversion method and electromagnetic wave detection method
US-2024355601-A1 · Oct 24, 2024 · US
Phototube
US-11961725-B2 · Apr 16, 2024 · US
Photoelectric tube
US-11894223-B2 · Feb 6, 2024 · US
Phototube
US-2023369035-A1 · Nov 16, 2023 · US
Photoelectric tube
US-2023352285-A1 · Nov 2, 2023 · US
Photoelectric-surface electron source
US-2023343541-A1 · Oct 26, 2023 · US
Photoelectric surface
US-2023301122-A1 · Sep 21, 2023 · US
Electron tube, electron tube module, and optical device
US-2023296816-A1 · Sep 21, 2023 · US
Photocathode, and method for manufacturing photocathode
US-11728119-B2 · Aug 15, 2023 · US
Photocathode, electron tube, and method for manufacturing photocathode
US-11688592-B2 · Jun 27, 2023 · US
Photocathode, and method for manufacturing photocathode
US-2023187161-A1 · Jun 15, 2023 · US
Electron tube and imaging device
US-2022319794-A1 · Oct 6, 2022 · US
Photo-cathode for a vacuum system
US-2022310349-A1 · Sep 29, 2022 · US
Photocathode, electron tube, and method for manufacturing photocathode
US-2022230860-A1 · Jul 21, 2022 · US
Global shutter for transmission mode secondary electron intensifier by a low voltage signal
US-2021335587-A1 · Oct 28, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01J40/06?
- CPC H01J40/06 is the Cooperative Patent Classification code for “Photo-emissive cathodes.”
- How many patents are filed under CPC H01J40/06 (Photo-emissive cathodes)?
- Our database includes 66 publications tagged with this CPC code.
- Is patent activity under CPC H01J40/06 growing?
- Publication counts under this code: 9 in 2024 vs 4 in 2025 (latest complete years).