G08B 21/12
Responsive to undesired emission of substances
Official title: responsive to undesired emission of substances, e.g. pollution alarms
G08B21/12 (Responsive to undesired emission of substances) appears on 1,245 US grants and 1,538 published applications in this corpus.
Search patents in G08B- Granted patents
- 1,245
- Published applications
- 1,538
- Assignees
- 726
- Inventors
- 2,920
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 5 | 0 |
| 2001 | 10 | 3 |
| 2002 | 14 | 11 |
| 2003 | 7 | 18 |
| 2004 | 21 | 32 |
| 2005 | 11 | 28 |
| 2006 | 29 | 36 |
| 2007 | 25 | 63 |
| 2008 | 24 | 41 |
| 2009 | 24 | 43 |
| 2010 | 29 | 29 |
| 2011 | 29 | 27 |
| 2012 | 19 | 37 |
| 2013 | 29 | 25 |
| 2014 | 33 | 50 |
| 2015 | 41 | 93 |
| 2016 | 61 | 75 |
| 2017 | 72 | 113 |
| 2018 | 81 | 101 |
| 2019 | 92 | 113 |
| 2020 | 102 | 108 |
| 2021 | 92 | 100 |
| 2022 | 77 | 96 |
| 2023 | 77 | 108 |
| 2024 | 85 | 77 |
| 2025 | 69 | 71 |
| 2026 | 49 | 40 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Monitoring system for use with mobile communication device6 Oct 2026US 12,755,624 B2
- Comparative methods for air quality measurement and use thereof22 Sep 2026US 12,742,760 B2Uhoo Pte Ltd
- Gas detection equipment15 Sep 2026US 12,736,444 B2Weltall Technology Corp.
- Environmental monitoring device using smart phone15 Sep 2026US 12,736,510 B2Deepvisions Co., Ltd.
- Air monitoring and air insight generation15 Sep 2026US 12,738,142 B2Turo Inc.
- Intelligent care device and system1 Oct 2026US 2026/0301937 A1Coplus Inc.
- Security systems and methods for detecting anomalous events using sensors10 Sep 2026US 2026/0268748 A1State Farm Mutual Automobile Insurance Company
- Monitoring, detection and notification system of spills and leaks from tanks and tipping over of vehicles, boats and vessels20 Aug 2026US 2026/0245445 A1
- Functionalized graphene and methods of use thereof20 Aug 2026US 2026/0247117 A1
- Systems and methods for detection of smoke and electrical component failure in power distribution systems13 Aug 2026US 2026/0237278 A1GE Aviation Systems LLC
Most cited
By later US patents
- Methods for differential image quality enhancement for a multiple detector system, systems and use thereof1,019US 9,471,969 B2ExxonMobil Upstream Research Company · 2016
- Mobile entertainment and communication device517US 7,321,783 B2Minerva Industries, Inc. · 2008
- System and method for emergency notification content delivery362US 7,233,781 B2Ochoa Optics LLC · 2007
- Environmental sensor device with alarms333US 9,280,884 B1Oberon, Inc. · 2016
- Functional monitoring of an electrolytic gas sensor having three electrodes, and hazard alarm and gas measuring device248US 9,360,449 B2Siemens Aktiengesellschaft · 2016