H01J 2201/312
Having an electric field perpendicular to the surface thereof
Official title: having an electric field perpendicular to the surface thereof
H01J2201/312 (Having an electric field perpendicular to the surface thereof) appears on 51 US grants and 71 published applications in this corpus.
Search patents in H01J- Granted patents
- 51
- Published applications
- 71
- Assignees
- 26
- Inventors
- 134
- Latest grant
- 8 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 2 |
| 2003 | 1 | 5 |
| 2004 | 6 | 4 |
| 2005 | 5 | 10 |
| 2006 | 1 | 14 |
| 2007 | 2 | 4 |
| 2008 | 1 | 3 |
| 2009 | 4 | 1 |
| 2010 | 1 | 8 |
| 2011 | 2 | 3 |
| 2012 | 4 | 1 |
| 2013 | 4 | 2 |
| 2014 | 3 | 0 |
| 2015 | 0 | 8 |
| 2016 | 8 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 3 |
| 2024 | 1 | 1 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Ionization detector and detection method8 Apr 2025US 12,272,512 B2KETEK GmbH Halbleiter- und Reinraumtechnik
- Electron emitter structure, external photoelectric effect emitter, particle collecting device, tunnel surface emitter, semiconductor- based direct emitter and liquid ioniser comprising same, gas sensor comprising an emitter or emitter structure, method for generating free electrons, and method for collecting particles8 Apr 2025US 12,272,513 B2DBT GmbH
- Electron emitting element and method for manufacturing same30 Jan 2024US 11,887,802 B2National Institute of Advanced Industrial Science and Technology
- Electron emitting element10 Jan 2023US 11,551,902 B2Sharp Kabushiki Kaisha
- Electron emission source12 Jul 2016US 9,390,878 B2Hon Hai Precision Industry Co., Ltd.
- Field emission device, and x-ray generation device using same27 Nov 2025US 2025/0364204 A1LG Electronics Inc.
- Electron emitter structure, external photoelectric effect emitter, particle collecting device, tunnel surface emitter, semiconductor-based direct emitter and liquid ioniser comprising same, gas sensor comprising an emitter or emitter structure, method for generating free electrons, and method for collecting particles8 Aug 2024US 2024/0266134 A1DBT GmbH
- Electron source, plasma source and switch device23 Nov 2023US 2023/0377828 A1Kabushiki Kaisha Toshiba
- Ionization Detector and Detection Method16 Nov 2023US 2023/0369001 A1KETEK GmbH Halbleiter- und Reinraumtechnik
- Electron emitting element and method for manufacturing same4 May 2023US 2023/0134647 A1National Institute of Advanced Industrial Science and Technology
Most cited
By later US patents
- Emitter and method of making51US 7,118,982 B2Hewlett-Packard Development Company, L. P. · 2006
- Method and apparatus for transmitting images to a viewing screen45US 4,575,765 AM. A. N. Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft · 1986
- Flat panel display and method of manufacture39US 4,577,133 A1986
- Electron emission elements integrated substrate24US 5,315,206 ARicoh Company, Ltd. · 1994
- Display device of flat panel structure with emission devices of matrix array24US 6,787,992 B2Pioneer Corporation · 2004