H01J 40/16
Photoelectric discharge tubes not involving the ionisation of a gas: having photo-
Official title: having photo- emissive cathode, e.g. alkaline photoelectric cell (operating with secondary emission H01J43/00)
H01J40/16 (Photoelectric discharge tubes not involving the ionisation of a gas: having photo-) appears on 79 US grants and 61 published applications in this corpus.
Search patents in H01J- Granted patents
- 79
- Published applications
- 61
- Assignees
- 45
- Inventors
- 167
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 6 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 2 |
| 2007 | 1 | 4 |
| 2008 | 0 | 1 |
| 2009 | 4 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 4 |
| 2014 | 1 | 4 |
| 2015 | 3 | 5 |
| 2016 | 3 | 1 |
| 2017 | 1 | 3 |
| 2018 | 7 | 7 |
| 2019 | 7 | 5 |
| 2020 | 9 | 6 |
| 2021 | 3 | 2 |
| 2022 | 0 | 2 |
| 2023 | 3 | 7 |
| 2024 | 6 | 1 |
| 2025 | 3 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Photoelectric conversion device, electromagnetic wave detection device, photoelectric conversion method and electromagnetic wave detection method26 May 2026US 12,640,354 B2Hamamatsu Photonics K.K.
- Electron tube, imaging device and electromagnetic wave detection device8 Jul 2025US 12,354,858 B2Hamamatsu Photonics K.K.
- Electron tube, electron tube module, and optical device11 Mar 2025US 12,248,159 B2Hamamatsu Photonics K.K.
- Dose rate monitor, system and method18 Feb 2025US 12,226,654 B2Varian Medical Systems, Inc.
- Photoelectric-surface electron source12 Nov 2024US 12,142,450 B2Hamamatsu Photonics K.K.
- Photoelectric conversion device, electromagnetic wave detection device, photoelectric conversion method and electromagnetic wave detection method24 Oct 2024US 2024/0355601 A1Danmarks Tekniske Universitet
- Phototube16 Nov 2023US 2023/0369035 A1Hamamatsu Photonics K.K.
- Photoelectric tube2 Nov 2023US 2023/0352285 A1Hamamatsu Photonics K.K.
- Photoelectric-surface electron source26 Oct 2023US 2023/0343541 A1Hamamatsu Photonics K.K.
- Electron tube, electron tube module, and optical device21 Sep 2023US 2023/0296816 A1Hamamatsu Photonics K.K.
Most cited
By later US patents
- Method and apparatus for photoelectric generation of electricity38US 5,973,259 A1999
- Fluorescent discharge cold cathode for an image display device20US 4,029,984 ARCA Corporation · 1977
- Electron sources utilizing patterned negative electron affinity photocathodes17US 5,932,966 AIntevac, Inc. · 1999
- Photocathode16US 6,908,355 B2Burle Technologies, Inc. · 2005
- Process for stampable photoelectric generator15US 5,981,866 ABorealis Technical Limited · 1999