H01J 1/14
Characterised by the material
Official title: characterised by the material
H01J1/14 (Characterised by the material) appears on 256 US grants and 147 published applications in this corpus.
Search patents in H01J- Granted patents
- 256
- Published applications
- 147
- Assignees
- 121
- Inventors
- 512
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 5 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 7 | 0 |
| 1982 | 2 | 0 |
| 1983 | 7 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 5 | 0 |
| 1992 | 7 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 8 | 0 |
| 1999 | 7 | 0 |
| 2000 | 11 | 0 |
| 2001 | 5 | 3 |
| 2002 | 10 | 11 |
| 2003 | 9 | 8 |
| 2004 | 9 | 7 |
| 2005 | 5 | 3 |
| 2006 | 3 | 5 |
| 2007 | 1 | 2 |
| 2008 | 2 | 4 |
| 2009 | 2 | 12 |
| 2010 | 4 | 8 |
| 2011 | 9 | 5 |
| 2012 | 6 | 5 |
| 2013 | 5 | 7 |
| 2014 | 3 | 6 |
| 2015 | 2 | 3 |
| 2016 | 9 | 3 |
| 2017 | 5 | 3 |
| 2018 | 4 | 3 |
| 2019 | 4 | 7 |
| 2020 | 10 | 6 |
| 2021 | 10 | 7 |
| 2022 | 4 | 7 |
| 2023 | 3 | 6 |
| 2024 | 7 | 9 |
| 2025 | 8 | 4 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electron gun using virtual source method23 Jun 2026US 12,665,154 B2Korea Research Institute of Standards and Science
- Electron source and method for manufacturing same, and emitter and device provided with same19 May 2026US 12,633,487 B2Denka Company Limited
- Emitter and device comprising same24 Mar 2026US 12,586,747 B2Denka Company Limited
- Negative ion source and negative ion generation method24 Feb 2026US 12,558,663 B2Japan Atomic Energy Agency
- Charged particle beam source13 Jan 2026US 12,525,420 B2FEI Company
- Preparation method of tungsten-rhenium-based diffusion-type thermionic cathode material containing low melting point barium calcium aluminate salt24 Sep 2026US 2026/0290736 A1Beijing University of Technology
- Sintered material, method for producing same, and electron source and device provided with same13 Aug 2026US 2026/0233304 A1
- Cathode and manufacturing method thereof23 Jul 2026US 2026/0213111 A1Shanghai United Imaging Healthcare Co., Ltd.
- Emitter, electron gun and electronic apparatus, and emitter manufacturing method4 Dec 2025US 2025/0372334 A1
- Emitter and device comprising same3 Jul 2025US 2025/0218717 A1Denka Company Limited
Most cited
By later US patents
- Carbon nanotube device, manufacturing method of carbon nanotube device, and electron emitting device135US 6,628,053 B1Canon Kabushiki Kaisha · 2003
- EL sheet diaphragm and a switch using the same54US 5,871,088 AMatsushita Electric Industrial Co., Ltd. · 1999
- Low work function electrode52US 5,874,039 ABorealis Technical Limited · 1999
- Devices containing a carbon nanotube48US 6,720,728 B2Canon Kabushiki Kaisha · 2004
- Structure for enhancing electron emission from carbon-containing cathode44US 5,463,271 AMassachusetts Institute of Technology · 1995