H01J 31/506
Tubes using secondary emission effect
Official title: {tubes using secondary emission effect}
H01J31/506 (Tubes using secondary emission effect) appears on 168 US grants and 95 published applications in this corpus.
Search patents in H01J- Granted patents
- 168
- Published applications
- 95
- Assignees
- 70
- Inventors
- 266
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 8 | 0 |
| 2002 | 4 | 2 |
| 2003 | 2 | 2 |
| 2004 | 3 | 7 |
| 2005 | 7 | 7 |
| 2006 | 7 | 4 |
| 2007 | 1 | 2 |
| 2008 | 3 | 0 |
| 2009 | 1 | 3 |
| 2010 | 3 | 8 |
| 2011 | 7 | 6 |
| 2012 | 5 | 3 |
| 2013 | 1 | 5 |
| 2014 | 1 | 4 |
| 2015 | 9 | 2 |
| 2016 | 2 | 1 |
| 2017 | 2 | 1 |
| 2018 | 1 | 3 |
| 2019 | 4 | 3 |
| 2020 | 7 | 4 |
| 2021 | 3 | 3 |
| 2022 | 1 | 2 |
| 2023 | 3 | 6 |
| 2024 | 8 | 9 |
| 2025 | 6 | 7 |
| 2026 | 4 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Nightvision tube module simplification23 Jun 2026US 12,665,156 B2L3Harris Technologies, Inc.
- Multi-zone display with transparency compensation16 Jun 2026US 12,658,124 B2L3Harris Technologies, Inc.
- Photocathode including nanostructures for extended wavelengths16 Jun 2026US 12,658,397 B2L3Harris Technologies, Inc.
- Image intensifier with dynamic optocoupler elements24 Feb 2026US 12,562,332 B1
- Substrate stack epitaxies for photocathodes for extended wavelengths7 Oct 2025US 12,437,954 B2L3Harris Technologies, Inc.
- Microchannel Plate, Preparation Method and Application Thereof1 Jan 2026US 2026/0005006 A1China Building Materials Academy Co., Ltd.
- Substrate stack epitaxies for photocathodes for extended wavelengths18 Dec 2025US 2025/0385062 A1L3Harris Technologies, Inc.
- Nightvision tube module simplification27 Nov 2025US 2025/0364203 A1L3Harris Technologies, Inc.
- Design of lattice matched photocathodes for extended wavelengths31 Jul 2025US 2025/0246392 A1L3Harris Technologies, Inc.
- Microchannel plate image intensifiers and methods of producing the same5 Jun 2025US 2025/0182995 A1SiOnyx, Inc.
Most cited
By later US patents
- Integrated imaging and ranging lidar receiver64US 5,198,657 AGeneral Atomics · 1993
- Low intensity X-ray and gamma-ray imaging device46US 4,142,101 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1979
- Microchannel spatial light modulator37US 4,481,531 AMassachusetts Institute of Technology · 1984
- Integrated imaging and ranging lidar receiver with ranging information pickoff circuit36US 5,220,164 AGeneral Atomics · 1993
- Channel plate multiplier having higher secondary emission coefficient near input28US 4,051,403 AThe United States of America as represented by the Secretary of the Army · 1977