H01J 23/0873
With at least one axial-field reversal along the interaction space
Official title: {with at least one axial-field reversal along the interaction space, e.g. P.P.M. focusing}
H01J23/0873 (With at least one axial-field reversal along the interaction space) appears on 38 US grants and 3 published applications in this corpus.
Search patents in H01J- Granted patents
- 38
- Published applications
- 3
- Assignees
- 14
- Inventors
- 53
- Latest grant
- 23 Jun 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 9 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Traveling wave tube with periodic permanent magnet focused multiple electron beams23 Jun 2020US 10,692,681 B1Calabazas Creek Research, Inc.
- Traveling wave tube and high-frequency circuit system4 Sep 2018US 10,068,738 B2NEC Network and Sensor Systems, Ltd.
- Periodic permanent magnet focused klystron21 Apr 2015US 9,013,104 B1Calabazas Creek Research, Inc.
- Microwave frequency structure for microwave tube with beam-containing device with permanent magnets and enhanced cooling23 Apr 2013US 8,427,057 B2Thales
- Non-axisymmetric periodic permanent magnet focusing system16 Feb 2010US 7,663,327 B2Massachusetts Institute of Technology
- Traveling wave tube and high-frequency circuit system18 May 2017US 2017/0140892 A1NEC Network and Sensor Systems, Ltd.
- Microwave structure for microwave tube beam confinement device with permanent magnets and enhanced cooling30 Dec 2010US 2010/0327743 A1Thales
- Non-axisymmetric periodic permanent magnet focusing system28 Dec 2006US 2006/0290452 A1Massachusetts Institute of Technology
Most cited
By later US patents
- Magnetic cladding for use in periodic permanent magnet stacks18US 5,107,238 AThe United States of America as represented by the Secretary of the Army · 1992
- Micropole undulator13US 4,800,353 AThe State of Oregon Acting by and through the State Board of Higher Education on Behalf of the University of Oregon · 1989
- Periodic permanent magnet structures13US 4,859,976 AThe United States of America as represented by the Secretary of the Army · 1989
- Periodic permanent magnet focused TWT10US 4,137,482 AVarian Associates, Inc. · 1979
- Advanced center post electron gun10US 5,461,282 ALitton Systems, Inc. · 1995