E02D 29/1481
Security devices
Official title: {Security devices, e.g. indicating unauthorised opening (E02D29/1427 takes precedence)}
E02D29/1481 (Security devices) appears on 35 US grants and 53 published applications in this corpus.
Search patents in E02D- Granted patents
- 35
- Published applications
- 53
- Assignees
- 30
- Inventors
- 97
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 4 |
| 2009 | 0 | 1 |
| 2010 | 2 | 0 |
| 2011 | 1 | 3 |
| 2012 | 0 | 0 |
| 2013 | 2 | 2 |
| 2014 | 2 | 4 |
| 2015 | 2 | 4 |
| 2016 | 2 | 5 |
| 2017 | 7 | 6 |
| 2018 | 5 | 4 |
| 2019 | 2 | 3 |
| 2020 | 1 | 1 |
| 2021 | 1 | 3 |
| 2022 | 1 | 2 |
| 2023 | 1 | 1 |
| 2024 | 2 | 4 |
| 2025 | 2 | 0 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Manhole marker assembly30 Dec 2025US 12,509,841 B2
- Modular access cover15 Jul 2025US 12,359,391 B2Access Covers Australia Pty Ltd
- Monitoring device and well cover assembly18 Jun 2024US 12,012,713 B2Hon Hai Precision Industry Co., Ltd.
- Detecting and alleviating flooding and blocked storm sewers5 Mar 2024US 11,920,318 B2ObjectVideo Labs, LLC
- Reinforcement member and construction method21 Nov 2023US 11,821,159 B2Nippon Telegraph and Telephone Corporation
- Universal mount cover assembly for underground enclosures8 Oct 2026US 2026/0308865 A1Oldcastle Infrastructure, Inc.
- Smart manhole monitoring system with simplified installation3 Sep 2026US 2026/0259087 A1
- Manhole Marker Assembly26 Mar 2026US 2026/0085483 A1
- Manhole cover, manhole covering and monitoring sytem26 Feb 2026US 2026/0055571 A1Aco Ahlmann SE & Co. KG
- Apparatus, system and method for monitoring a pit lid15 Aug 2024US 2024/0272242 A1Telstra Corporation Limited
Most cited
By later US patents
- Manhole security cover77US 8,674,830 B2McGard, Inc. · 2014
- Security key tool for manhole access opening security device23US 7,798,742 B2McGard, Inc. · 2010
- Latching arrangement for manhole cover19US 4,175,781 A1979
- Dish for use in a manhole17US 9,546,466 B2Utility Sealing Systems, Inc. · 2017
- Confined space entry station15US 9,964,530 B22018