H01J 1/3044
Point emitters
Official title: {Point emitters}
H01J1/3044 (Point emitters) appears on 227 US grants and 230 published applications in this corpus.
Search patents in H01J- Granted patents
- 227
- Published applications
- 230
- Assignees
- 123
- Inventors
- 447
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 6 | 6 |
| 2002 | 11 | 9 |
| 2003 | 8 | 9 |
| 2004 | 22 | 30 |
| 2005 | 16 | 21 |
| 2006 | 19 | 14 |
| 2007 | 8 | 10 |
| 2008 | 9 | 10 |
| 2009 | 5 | 8 |
| 2010 | 9 | 10 |
| 2011 | 7 | 9 |
| 2012 | 10 | 6 |
| 2013 | 7 | 14 |
| 2014 | 9 | 8 |
| 2015 | 8 | 7 |
| 2016 | 7 | 5 |
| 2017 | 8 | 8 |
| 2018 | 10 | 5 |
| 2019 | 5 | 9 |
| 2020 | 11 | 5 |
| 2021 | 4 | 5 |
| 2022 | 4 | 8 |
| 2023 | 5 | 3 |
| 2024 | 5 | 4 |
| 2025 | 5 | 5 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electron emission methods to generate electron beams with a narrow energy distribution25 Aug 2026US 12,719,005 B2The Regents of the University of California
- Systems and methods for fabricating silicon die stacks for electron emitter array chips26 May 2026US 12,640,326 B2
- Field emission electron source, electron optical device, and manufacturing method26 Aug 2025US 12,400,820 B2Hitachi, Ltd.
- Electron source, electron gun, and charged particle beam device19 Aug 2025US 12,394,585 B2Hitachi High-Tech Corporation
- Electrode and filament coupled by adapter12 Aug 2025US 12,387,902 B1FEI Company
- Silicon carbide based triode electron emitter and producing an electron beam with same23 Jul 2026US 2026/0213110 A1
- Backend field emission devices19 Mar 2026US 2026/0081089 A1
- Emitter, electron gun and electronic apparatus, and emitter manufacturing method4 Dec 2025US 2025/0372334 A1
- Junction between hexaboride-containing and tantalum-containing components20 Nov 2025US 2025/0357069 A1FEI Company
- Package having field emission element and x-ray device having the same28 Aug 2025US 2025/0275297 A1LG Electronics Inc.
Most cited
By later US patents
- Article comprising small diameter nanowires and method for making the same124US 6,465,132 B1Agere Systems Guardian Corp. · 2002
- Field emission display having porous silicon dioxide layer104US 6,835,111 B2Micron Technology, Inc. · 2004
- Field emission display having reduced power requirements and method100US 6,710,538 B1Micron Technology, Inc. · 2004
- Diamond/diamond-like carbon coated nanotube structures for efficient electron field emission67US 6,882,094 B2Fullerene International Corporation · 2005
- Composite, ordered material having sharp surface features62US 7,150,904 B2UT-Battelle, LLC · 2006