H03K 4/10
Using as active elements vacuum tubes only
Official title: using as active elements vacuum tubes only
H03K4/10 (Using as active elements vacuum tubes only) appears on 11 US grants and 13 published applications in this corpus.
Search patents in H03K- Granted patents
- 11
- Published applications
- 13
- Assignees
- 7
- Inventors
- 20
- Latest grant
- 18 Oct 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 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 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 2 |
| 2014 | 1 | 0 |
| 2015 | 1 | 2 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 2 |
| 2020 | 1 | 0 |
| 2021 | 1 | 2 |
| 2022 | 2 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 2 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Constant-current output control circuit and its design method18 Oct 2022US 11,476,767 B2Lii Semiconductor Co., Ltd
- Method and system for generating a ramping signal8 Mar 2022US 11,272,134 B2Cista System Corp.
- Method and system for generating a ramping signal27 Apr 2021US 10,992,893 B2Cista System Corp.
- Low frequency oscillator with ultra-low short circuit current24 Mar 2020US 10,601,408 B2Texas Instruments Incorporated
- Method and system for generating a ramping signal8 Oct 2019US 10,440,303 B2Cista System Corp.
- Device and method for generating high voltage modulated non-sinusoidal wave in semiconductor manufacturing facility using plasma2 Oct 2025US 2025/0308846 A1Dawonsys Co., Ltd.
- Apparatus and method for generating multi-level high voltage non-sinusoidal signal in semiconductor manufacturing equipment using plasma2 Oct 2025US 2025/0309873 A1Dawonsys Co., Ltd.
- Constant-current output control circuit and its design method23 Sep 2021US 2021/0296992 A1Lii Semiconductor Co., Ltd
- Method and system for generating a ramping signal8 Apr 2021US 2021/0105429 A1Cista System Corp.
- Method and system for generating a ramping signal21 Nov 2019US 2019/0356876 A1Cista System Corp.
Most cited
By later US patents
- Oscillator apparatus and method with wide adjustable frequency range11US 8,890,630 B2Crane Electronics, Inc. · 2014
- High voltage triangular waveform generator3US 3,932,817 A1976
- Method and system for generating a ramping signal2US 10,440,303 B2Cista System Corp. · 2019
- Method and system for generating a ramping signal2US 9,584,102 B2Cista System Corp. · 2017
- Method and system for generating a ramping signal2US 9,894,307 B2Cista System Corp. · 2018