H01J 2223/15
Means for preventing wave energy leakage structurally associated with tube leading-in arrangements
Official title: Means for preventing wave energy leakage structurally associated with tube leading-in arrangements, e.g. filters, chokes, attenuating devices
H01J2223/15 (Means for preventing wave energy leakage structurally associated with tube leading-in arrangements) appears on 5 US grants and 1 published applications in this corpus.
Search patents in H01J- Granted patents
- 5
- Published applications
- 1
- Assignees
- 4
- Inventors
- 15
- Latest grant
- 25 Nov 2003
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 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 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Magnetron having a lowered oscillation frequency and processing equipment employing the same25 Nov 2003US 6,653,788 B2Hitachi Electronic Devices Co., Ltd.
- Electron beam tube having particular structure of the vacuum envelope containing electron gun18 Jun 2002US 6,407,495 B1EEV Limited
- Electron beam tubes including ceramic material for realizing rf chokes23 Nov 1999US 5,990,621 AEEV Limited
- Electron beam tube arrangements having the input cavity comprised of electrically internal and external body portions20 Aug 1996US 5,548,245 AEEV Limited
- High frequency attenuator using ferrite beads27 Mar 1979US 4,146,854 ATDK Electronics Co., Ltd.
Most cited
By later US patents
- High frequency attenuator using ferrite beads35US 4,146,854 ATDK Electronics Co., Ltd. · 1979
- Magnetron having a lowered oscillation frequency and processing equipment employing the same10US 6,653,788 B2Hitachi Electronic Devices Co., Ltd. · 2003
- Electron beam tubes including ceramic material for realizing rf chokes4US 5,990,621 AEEV Limited · 1999
- Electron beam tube arrangements having the input cavity comprised of electrically internal and external body portions3US 5,548,245 AEEV Limited · 1996