H01J 43/00
Secondary-emission tubes
Official title: Secondary-emission tubes; Electron-multiplier tubes (dynamic electron-multiplier tubes H01J25/76)
H01J43/00 (Secondary-emission tubes) appears on 832 US grants and 474 published applications in this corpus.
Search patents in H01J- Granted patents
- 832
- Published applications
- 474
- Assignees
- 262
- Inventors
- 1,109
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 22 | 0 |
| 1978 | 21 | 0 |
| 1979 | 8 | 0 |
| 1980 | 7 | 0 |
| 1981 | 6 | 0 |
| 1982 | 7 | 0 |
| 1983 | 8 | 0 |
| 1984 | 10 | 0 |
| 1985 | 6 | 0 |
| 1986 | 16 | 0 |
| 1987 | 18 | 0 |
| 1988 | 10 | 0 |
| 1989 | 15 | 0 |
| 1990 | 18 | 0 |
| 1991 | 17 | 0 |
| 1992 | 19 | 0 |
| 1993 | 10 | 0 |
| 1994 | 15 | 0 |
| 1995 | 22 | 0 |
| 1996 | 24 | 0 |
| 1997 | 16 | 0 |
| 1998 | 17 | 0 |
| 1999 | 22 | 0 |
| 2000 | 15 | 0 |
| 2001 | 15 | 1 |
| 2002 | 14 | 8 |
| 2003 | 17 | 15 |
| 2004 | 18 | 32 |
| 2005 | 17 | 22 |
| 2006 | 33 | 26 |
| 2007 | 14 | 20 |
| 2008 | 23 | 28 |
| 2009 | 17 | 27 |
| 2010 | 27 | 17 |
| 2011 | 23 | 17 |
| 2012 | 13 | 15 |
| 2013 | 19 | 24 |
| 2014 | 17 | 25 |
| 2015 | 23 | 20 |
| 2016 | 23 | 19 |
| 2017 | 15 | 12 |
| 2018 | 21 | 15 |
| 2019 | 21 | 23 |
| 2020 | 19 | 18 |
| 2021 | 19 | 19 |
| 2022 | 14 | 13 |
| 2023 | 9 | 16 |
| 2024 | 14 | 22 |
| 2025 | 15 | 10 |
| 2026 | 10 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- High-speed polarity switching dual conversion dynode ion detector for mass spectrometer29 Sep 2026US 12,749,666 B2Thermo Finnigan LLC
- Photoelectric conversion device and photoelectric conversion method11 Aug 2026US 12,706,288 B2Hamamatsu Photonics K.K.
- All-optical single-photon detector14 Jul 2026US 12,683,137 B2Purdue Research Foundation
- Photoelectric conversion device, electromagnetic wave detection device, photoelectric conversion method and electromagnetic wave detection method26 May 2026US 12,640,354 B2Hamamatsu Photonics K.K.
- Ion detector and analyzer19 May 2026US 12,633,508 B2Hamamatsu Photonics K.K.
- Particle detectors based on direct conversion at the surface of a dense medium8 Oct 2026US 2026/0311979 A1Southwest Research Institute
- Capacitor as alternative to power supply for low leakage current ion optics elements in mass spectrometers8 Oct 2026US 2026/0311983 A1Thermo Finnigan LLC
- Micro-lens array for metal-channel photomultiplier tube30 Jul 2026US 2026/0221404 A1KLA Corporation
- Mcp detector and analysis device23 Jul 2026US 2026/0213123 A1Hamamatsu Photonics K.K.
- Photomultiplier tube2 Jul 2026US 2026/0188633 A1Hamamatsu Photonics K.K.
Most cited
By later US patents
- Polymeric compositions for manufacture of secondary electron multiplier tubes and method for manufacture thereof291US 4,093,562 AMatsushita Electric Industrial Co., Ltd. · 1978
- Microchannel plate technology197US 5,265,327 A1993
- Method of making a plate having a pattern of microchannels180US 4,153,855 AThe United States of America as represented by the Secretary of the Army · 1979
- Electron generating assembly for an x-ray tube having a cathode and having an electrode system for accelerating the electrons emanating from the cathode110US 5,576,549 ASiemens Aktiengesellschaft · 1996
- Preventive maintenance system for the photomultiplier detector blocks of pet scanners87US 5,384,699 AAssociated Universities, Inc. · 1995