F23N 2223/20
Opto-coupler
F23N2223/20 (Opto-coupler) appears on 40 US grants and 2 published applications in this corpus.
Search patents in F23N- Granted patents
- 40
- Published applications
- 2
- Assignees
- 26
- Inventors
- 53
- Latest grant
- 15 Dec 2015
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 6 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Systems and methods for controlling multistage electronic controlled gas valves15 Dec 2015US 9,212,821 B2Emerson Electric Co.
- Distributed appliance control system having fault isolation27 Apr 2004US 6,728,600 B1Honeywell International Inc.
- Motor step-less speed control with active feedback of phase detector12 Feb 2002US 6,346,789 B1Honeywell International Inc.
- Integrated appliance control system10 Oct 2000US 6,129,284 ATridelta Industries, Inc.
- Integrated appliance control system9 May 2000US 6,059,195 ATridelta Industries, Inc.
Most cited
By later US patents
- Integrated appliance control system186US 6,059,195 ATridelta Industries, Inc. · 2000
- Distributed appliance control system having fault isolation63US 6,728,600 B1Honeywell International Inc. · 2004
- High efficiency wood pellet stove49US 5,873,356 AControl Options, Inc. · 1999
- Test circuit for system monitoring apparatus43US 4,986,468 AA. O. Smith Corporation · 1991
- Integrated appliance control system36US 6,129,284 ATridelta Industries, Inc. · 2000