G08B 13/1681
Using infrasonic detecting means
Official title: {using infrasonic detecting means, e.g. a microphone operating below the audible frequency range}
G08B13/1681 (Using infrasonic detecting means) appears on 34 US grants and 28 published applications in this corpus.
Search patents in G08B- Granted patents
- 34
- Published applications
- 28
- Assignees
- 25
- Inventors
- 71
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
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| 1996 | 1 | 0 |
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| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 3 |
| 2003 | 1 | 2 |
| 2004 | 3 | 1 |
| 2005 | 0 | 2 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 3 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 3 | 2 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 0 | 3 |
| 2020 | 1 | 1 |
| 2021 | 3 | 4 |
| 2022 | 2 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Occupant detection system for vehicle69US 8,258,932 B2Donnelly Corporation · 2012
- Apparatus for detecting presence of person inside room having door43US 5,153,560 ASumitomo Metal Mining Co., Ltd. · 1992
- Infra-sonic detector and alarm with self adjusting reference27US 4,991,145 ARabbit Systems, Inc. · 1991
- Glass break sensor having reduced false alarm probability for use with intrusion alarms27US 5,323,141 AC & K Systems, Inc. · 1994
- Infra-sound surveillance system19US 6,570,500 B1Nokia Corporation · 2003