G08B 21/025
System arrangements wherein the alarm criteria uses absence of reply signal after
Official title: {System arrangements wherein the alarm criteria uses absence of reply signal after an elapsed time}
G08B21/025 (System arrangements wherein the alarm criteria uses absence of reply signal after) appears on 74 US grants and 108 published applications in this corpus.
Search patents in G08B- Granted patents
- 74
- Published applications
- 108
- Assignees
- 68
- Inventors
- 238
- Latest grant
- 5 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 3 |
| 2005 | 1 | 16 |
| 2006 | 6 | 4 |
| 2007 | 1 | 7 |
| 2008 | 4 | 5 |
| 2009 | 3 | 5 |
| 2010 | 2 | 5 |
| 2011 | 3 | 7 |
| 2012 | 1 | 1 |
| 2013 | 3 | 7 |
| 2014 | 3 | 5 |
| 2015 | 3 | 3 |
| 2016 | 3 | 2 |
| 2017 | 6 | 8 |
| 2018 | 4 | 2 |
| 2019 | 3 | 9 |
| 2020 | 6 | 5 |
| 2021 | 8 | 5 |
| 2022 | 3 | 4 |
| 2023 | 3 | 1 |
| 2024 | 3 | 2 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Real-time worker location tracking system5 Aug 2025US 12,380,792 B2Saudi Arabian Oil Company
- Security system, method of emitting an alarm signal, bus, use of a security system18 Mar 2025US 12,254,754 B2rapitag GmbH
- Personal safety system29 Oct 2024US 12,131,620 B2Robert Bosch GmbH
- Warnings dependent on location6 Aug 2024US 12,057,004 B2Nokia Technologies Oy
- Deferrable tracking for GPS mobile communication devices30 Jan 2024US 11,887,456 B1Herron Holdings Group LLC
- Real-time worker location tracking system10 Jul 2025US 2025/0225854 A1Saudi Arabian Oil Company
- Cargo monitoring, tracking and recovery system17 Oct 2024US 2024/0349021 A1Optio Technologies LLC
- Vehicle monitoring apparatus and vehicle monitoring method18 Jul 2024US 2024/0242593 A1Panasonic Intellectual Property Management Co., Ltd.
- Personal safety system25 May 2023US 2023/0162590 A1Robert Bosch GmbH
- Security system, method of emitting an alarm signal, bus, use of a security system24 Nov 2022US 2022/0375321 A1rapitag GmbH
Most cited
By later US patents
- Lost pet notification system409US 6,067,018 A2000
- Battery with electronic compartment392US 8,310,201 B1Cypress Semiconductor Corporation · 2012
- Footwear with GPS211US 6,788,200 B12004
- Systems and methods for monitoring spatial relationship between mobile objects116US 6,265,974 B1Lexent Technologies, Inc. · 2001
- Alerting a care-provider when an elderly or infirm person in distress fails to acknowledge a periodically recurrent interrogative cue92US 7,042,338 B1Savvystuff Property Trust · 2006