H01J 31/00
Cathode ray tubes
Official title: Cathode ray tubes; Electron beam tubes (H01J25/00, H01J33/00, H01J35/00, H01J37/00 take precedence; details of cathode ray tubes or of electron beam tubes H01J29/00)
H01J31/00 (Cathode ray tubes) appears on 2,995 US grants and 1,780 published applications in this corpus.
Search patents in H01J- Granted patents
- 2,995
- Published applications
- 1,780
- Assignees
- 594
- Inventors
- 3,763
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 78 | 0 |
| 1977 | 73 | 0 |
| 1978 | 78 | 0 |
| 1979 | 52 | 0 |
| 1980 | 49 | 0 |
| 1981 | 48 | 0 |
| 1982 | 41 | 0 |
| 1983 | 33 | 0 |
| 1984 | 37 | 0 |
| 1985 | 31 | 0 |
| 1986 | 37 | 0 |
| 1987 | 54 | 0 |
| 1988 | 49 | 0 |
| 1989 | 42 | 0 |
| 1990 | 59 | 0 |
| 1991 | 39 | 0 |
| 1992 | 48 | 0 |
| 1993 | 57 | 0 |
| 1994 | 53 | 0 |
| 1995 | 53 | 0 |
| 1996 | 83 | 0 |
| 1997 | 83 | 0 |
| 1998 | 119 | 0 |
| 1999 | 110 | 0 |
| 2000 | 102 | 0 |
| 2001 | 103 | 31 |
| 2002 | 105 | 114 |
| 2003 | 106 | 103 |
| 2004 | 94 | 124 |
| 2005 | 85 | 180 |
| 2006 | 106 | 216 |
| 2007 | 110 | 259 |
| 2008 | 108 | 165 |
| 2009 | 89 | 127 |
| 2010 | 127 | 117 |
| 2011 | 110 | 83 |
| 2012 | 97 | 65 |
| 2013 | 55 | 34 |
| 2014 | 28 | 32 |
| 2015 | 34 | 19 |
| 2016 | 20 | 5 |
| 2017 | 15 | 17 |
| 2018 | 12 | 10 |
| 2019 | 14 | 11 |
| 2020 | 16 | 10 |
| 2021 | 10 | 7 |
| 2022 | 3 | 10 |
| 2023 | 8 | 14 |
| 2024 | 13 | 13 |
| 2025 | 11 | 9 |
| 2026 | 8 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Sterilization of an object using low energy electron beam28 Jul 2026US 12,691,189 B2Pharmalab Idia Pvt. Ltd.
- 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.
- Photoelectric conversion device, electromagnetic wave detection device, photoelectric conversion method and electromagnetic wave detection method3 Mar 2026US 12,567,553 B2Danmarks Tekniske Universitet
- Sterilization of an object using low energy electron beam13 Aug 2026US 2026/0232852 A1Pharmalab India Pvt. Ltd.
- Sterilization of an object using low energy electron beam13 Aug 2026US 2026/0232853 A1Pharmalab India Pvt. Ltd.
- Streak tube23 Jul 2026US 2026/0213112 A1Hamamatsu Photonics K.K.
- Electron emission source18 Jun 2026US 2026/0171342 A1Infovion Inc.
- Microchannel Plate, Preparation Method and Application Thereof1 Jan 2026US 2026/0005006 A1China Building Materials Academy Co., Ltd.
Most cited
By later US patents
- Light-emitting device having light-reflective layer formed with, or/and adjacent to, material that enhances device performance211US 6,630,786 B2Candescent Intellectual Property Services, Inc. · 2003
- Matrix-addressed flat panel display199US 4,857,799 ASRI International · 1989
- Field emission cathode based flat panel display having polyimide spacers186US 5,063,327 AColoray Display Corporation · 1991
- Spacers for field emission display fabricated via self-aligned high energy ablation175US 5,232,549 AMicron Technology, Inc. · 1993
- Field emission cold-cathode device169US 6,097,138 AKabushiki Kaisha Toshiba · 2000