H01J 3/04
Ion guns
H01J3/04 (Ion guns) appears on 54 US grants and 51 published applications in this corpus.
Search patents in H01J- Granted patents
- 54
- Published applications
- 51
- Assignees
- 34
- Inventors
- 118
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 3 | 1 |
| 2004 | 0 | 2 |
| 2005 | 2 | 0 |
| 2006 | 0 | 2 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 4 |
| 2010 | 0 | 6 |
| 2011 | 5 | 1 |
| 2012 | 5 | 7 |
| 2013 | 5 | 1 |
| 2014 | 2 | 8 |
| 2015 | 6 | 5 |
| 2016 | 6 | 3 |
| 2017 | 4 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 1 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 1 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Filament alignment device21 Apr 2026US 12,609,281 B2Samsung Electronics Co., Ltd.
- Charge carrier generation source28 Jan 2025US 12,211,663 B2Scia Systems GmbH
- Electron multipliers having improved gain stability2 Apr 2024US 11,948,785 B2Adaptas Solutions Pty Ltd
- Self-aligned electrospray device and related manufacturing techniques4 Jan 2022US 11,217,417 B2Massachusetts Institute of Technology
- Marking paper products13 Aug 2019US 10,380,388 B2Xyleco, Inc.
- Transport Package for Charged Particle Gun and Maintenance Method for Charged Particle Gun20 Aug 2026US 2026/0245824 A1Hitachi High-Tech Corporation
- Filament alignment device9 May 2024US 2024/0153740 A1Samsung Electronics Co., Ltd.
- Electron multipliers having improved gain stability21 Sep 2023US 2023/0298873 A1Adaptas Solutions Pty Ltd
- Charge carrier generation source22 Dec 2022US 2022/0406559 A1Scia Systems GmbH
- Self-aligned electrospray device and related manufacturing techniques17 Dec 2020US 2020/0395186 A1Massachusetts Institute of Technology
Most cited
By later US patents
- Negative ion source method and apparatus used in conjunction with a charged particle cancer therapy system108US 7,943,913 B22011
- Discharge device having cathode with micro hollow array70US 5,686,789 AOsram Sylvania Inc. · 1997
- Discharge device having cathode with micro hollow array60US 5,939,829 AOsram Sylvania Inc. · 1999
- Tandem accelerator method and apparatus used in conjunction with a charged particle cancer therapy system52US 8,198,607 B22012
- Charged particle cancer therapy patient positioning method and apparatus48US 8,581,215 B22013