H01J 1/02
Main electrodes
H01J1/02 (Main electrodes) appears on 3,025 US grants and 2,083 published applications in this corpus.
Search patents in H01J- Granted patents
- 3,025
- Published applications
- 2,083
- Assignees
- 833
- Inventors
- 4,486
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 23 | 0 |
| 1977 | 22 | 0 |
| 1978 | 22 | 0 |
| 1979 | 23 | 0 |
| 1980 | 15 | 0 |
| 1981 | 24 | 0 |
| 1982 | 23 | 0 |
| 1983 | 20 | 0 |
| 1984 | 20 | 0 |
| 1985 | 22 | 0 |
| 1986 | 19 | 0 |
| 1987 | 22 | 0 |
| 1988 | 18 | 0 |
| 1989 | 34 | 0 |
| 1990 | 35 | 0 |
| 1991 | 49 | 0 |
| 1992 | 47 | 0 |
| 1993 | 47 | 0 |
| 1994 | 49 | 0 |
| 1995 | 56 | 0 |
| 1996 | 75 | 0 |
| 1997 | 88 | 0 |
| 1998 | 124 | 0 |
| 1999 | 98 | 0 |
| 2000 | 104 | 0 |
| 2001 | 87 | 40 |
| 2002 | 117 | 115 |
| 2003 | 118 | 145 |
| 2004 | 143 | 174 |
| 2005 | 125 | 178 |
| 2006 | 98 | 169 |
| 2007 | 88 | 148 |
| 2008 | 87 | 101 |
| 2009 | 83 | 135 |
| 2010 | 118 | 111 |
| 2011 | 110 | 79 |
| 2012 | 80 | 53 |
| 2013 | 72 | 70 |
| 2014 | 56 | 55 |
| 2015 | 55 | 53 |
| 2016 | 65 | 43 |
| 2017 | 50 | 48 |
| 2018 | 48 | 30 |
| 2019 | 41 | 60 |
| 2020 | 74 | 38 |
| 2021 | 49 | 61 |
| 2022 | 39 | 40 |
| 2023 | 36 | 45 |
| 2024 | 47 | 45 |
| 2025 | 43 | 32 |
| 2026 | 17 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01J 1/30Cold cathodes1,928
- H01J 1/13Solid thermionic cathodes758
- H01J 1/34Photo-emissive cathodes269
- H01J 1/32Secondary-electron-emitting electrodes68
- H01J 1/025Hollow cathodes58
- H01J 1/36Solid anodes28
- H01J 1/04Liquid electrodes15
- H01J 1/35Electrodes exhibiting both secondary emission and photo-emission10
All 9 subgroupsShow fewer
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Most cited
By later US patents
- Very high speed integrated microelectronic tubes410US 4,721,885 ASRI International · 1988
- Electron source with micropoint emissive cathodes and display means by cathodoluminescence excited by field emission using said source400US 4,940,916 ACommissariat A L' Energie Atomique · 1990
- Self-oriented bundles of carbon nanotubes and method of making same326US 6,232,706 B1The Board of Trustees of the Leland Stanford Junior University · 2001
- Vertical microelectronic field emission devices312US 5,475,280 AMcnc · 1995
- Microelectronic and microelectromechanical devices comprising carbon nanotube components, and methods of making same295US 6,445,006 B1Advanced Technology Materials, Inc. · 2002