F23N 2223/00
Signal processing
Official title: Signal processing; Details thereof
F23N2223/00 (Signal processing) appears on 843 US grants and 538 published applications in this corpus.
Search patents in F23N- Granted patents
- 843
- Published applications
- 538
- Assignees
- 440
- Inventors
- 1,705
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 8 | 0 |
| 1978 | 3 | 0 |
| 1979 | 9 | 0 |
| 1980 | 4 | 0 |
| 1981 | 22 | 0 |
| 1982 | 9 | 0 |
| 1983 | 15 | 0 |
| 1984 | 13 | 0 |
| 1985 | 13 | 0 |
| 1986 | 10 | 0 |
| 1987 | 10 | 0 |
| 1988 | 13 | 0 |
| 1989 | 26 | 0 |
| 1990 | 30 | 0 |
| 1991 | 32 | 0 |
| 1992 | 18 | 0 |
| 1993 | 24 | 0 |
| 1994 | 26 | 0 |
| 1995 | 20 | 0 |
| 1996 | 22 | 0 |
| 1997 | 14 | 0 |
| 1998 | 15 | 0 |
| 1999 | 33 | 0 |
| 2000 | 16 | 0 |
| 2001 | 18 | 7 |
| 2002 | 12 | 18 |
| 2003 | 35 | 14 |
| 2004 | 18 | 23 |
| 2005 | 8 | 21 |
| 2006 | 15 | 24 |
| 2007 | 12 | 22 |
| 2008 | 8 | 14 |
| 2009 | 16 | 22 |
| 2010 | 12 | 18 |
| 2011 | 8 | 21 |
| 2012 | 16 | 17 |
| 2013 | 8 | 15 |
| 2014 | 13 | 15 |
| 2015 | 15 | 25 |
| 2016 | 12 | 23 |
| 2017 | 17 | 25 |
| 2018 | 22 | 20 |
| 2019 | 21 | 28 |
| 2020 | 21 | 37 |
| 2021 | 30 | 32 |
| 2022 | 21 | 25 |
| 2023 | 22 | 27 |
| 2024 | 16 | 24 |
| 2025 | 20 | 15 |
| 2026 | 12 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F23N 2223/08MicroprocessorIndexing code422
- F23N 2223/22Timing networkIndexing code99
- F23N 2223/04MemoryIndexing code89
- F23N 2223/38Remote controlIndexing code77
- F23N 2223/40SimulationIndexing code59
- F23N 2223/44Optimum controlIndexing code44
- F23N 2223/20Opto-couplerIndexing code40
- F23N 2223/48Learning / adaptive controlIndexing code39
All 23 subgroupsShow fewer
- F23N 2223/06SamplingIndexing code35
- F23N 2223/10CorrelationIndexing code35
- F23N 2223/36Pid signal processingIndexing code34
- F23N 2223/30SwitchesIndexing code24
- F23N 2223/52Fuzzy logicIndexing code24
- F23N 2223/54RecordingIndexing code24
- F23N 2223/14DifferentiationIndexing code14
- F23N 2223/42Function generatorIndexing code14
- F23N 2223/12IntegrationIndexing code11
- F23N 2223/02Multiplex transmissionIndexing code10
- F23N 2223/34Signal processing: with feedforward processingIndexing code10
- F23N 2223/46IdentificationIndexing code9
- F23N 2223/16Measuring bridgeIndexing code4
- F23N 2223/50Human controlIndexing code3
- F23N 2223/18ChopperIndexing code1
Recent patents
- Systems and methods for automated furnace inducer sensor output verification22 Sep 2026US 12,742,548 B2Rheem Manufacturing Company
- Control unit for detecting a flame in operation using flame monitors suitable for burners and flame monitoring system1 Sep 2026US 12,723,756 B2BFI Automation Mindermann GmbH
- Method and apparatus for regulating a flame length in a partial oxidation reactor11 Aug 2026US 12,704,258 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Fluid heating system with combustion trim learning14 Jul 2026US 12,680,727 B2A. O. Smith Corporation
- Atomization burner with flexible fire rate14 Apr 2026US 12,601,481 B2Babington Technology, Inc.
- Biomass heater system and method20 Aug 2026US 2026/0243431 A1The Research Foundation for The State University of New York
- Electronic closed-loop control device for fireplaces comprising a lower combustion system23 Jul 2026US 2026/0210553 A1Maxitrol Company
- System and method for optimizing combustion in a boiler30 Apr 2026US 2026/0117968 A1General Electric Technology GmbH
- Systems and methods for flame monitoring in gas-powered appliances30 Apr 2026US 2026/0117974 A1Copeland Comfort Control LP
- Component with Bus Termination26 Feb 2026US 2026/0055893 A1Siemens Aktiengesellschaft
Most cited
By later US patents
- Graphical user interface system for a thermal comfort controller353US 6,595,430 B1Honeywell International Inc. · 2003
- Thermostat system communicating with a remote correspondent for receiving and displaying diverse information325US 6,619,555 B22003
- Thermostat system with location data271US 6,789,739 B22004
- Security system with wireless thermostat and method of operation thereof228US 6,619,055 B1Honeywell International Inc. · 2003
- Programmable electronic thermostat220US 4,308,991 AEmerson Electric Co. · 1982