E02D 29/12
Manhole shafts
Official title: Manhole shafts; Other inspection or access chambers; Accessories therefor (for underground tanks B65D90/10; for sewerage E03F5/02 {; climbing irons or ladders E06C9/00})
E02D29/12 (Manhole shafts) appears on 1,059 US grants and 734 published applications in this corpus.
Search patents in E02D- Granted patents
- 1,059
- Published applications
- 734
- Assignees
- 464
- Inventors
- 1,447
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 13 | 0 |
| 1978 | 16 | 0 |
| 1979 | 9 | 0 |
| 1980 | 8 | 0 |
| 1981 | 14 | 0 |
| 1982 | 6 | 0 |
| 1983 | 4 | 0 |
| 1984 | 13 | 0 |
| 1985 | 13 | 0 |
| 1986 | 13 | 0 |
| 1987 | 12 | 0 |
| 1988 | 14 | 0 |
| 1989 | 18 | 0 |
| 1990 | 24 | 0 |
| 1991 | 22 | 0 |
| 1992 | 14 | 0 |
| 1993 | 20 | 0 |
| 1994 | 30 | 0 |
| 1995 | 26 | 0 |
| 1996 | 24 | 0 |
| 1997 | 19 | 0 |
| 1998 | 24 | 0 |
| 1999 | 32 | 0 |
| 2000 | 16 | 0 |
| 2001 | 18 | 6 |
| 2002 | 25 | 15 |
| 2003 | 18 | 17 |
| 2004 | 31 | 22 |
| 2005 | 18 | 17 |
| 2006 | 17 | 25 |
| 2007 | 18 | 33 |
| 2008 | 15 | 28 |
| 2009 | 10 | 30 |
| 2010 | 26 | 23 |
| 2011 | 25 | 20 |
| 2012 | 10 | 23 |
| 2013 | 20 | 33 |
| 2014 | 35 | 41 |
| 2015 | 31 | 22 |
| 2016 | 28 | 46 |
| 2017 | 29 | 50 |
| 2018 | 34 | 31 |
| 2019 | 42 | 41 |
| 2020 | 25 | 40 |
| 2021 | 43 | 33 |
| 2022 | 31 | 25 |
| 2023 | 23 | 24 |
| 2024 | 29 | 38 |
| 2025 | 19 | 28 |
| 2026 | 19 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E02D 29/14Covers for manholes or the like793
- E02D 29/124Shaft entirely made of synthetic material120
- E02D 29/125Characterised by the lining of the shaft66
- E02D 29/128Repairs of manhole shafts54
- E02D 29/121Characterised by the connection between shaft elements53
- E02D 29/127With devices for impeding fall or injuries of persons47
- E02D 29/122Steps or handrails for shafts35
Recent patents
- Modular pit frame6 Oct 2026US 12,753,566 B2The Ford Meter Box Company, Inc.
- Manhole cover assembly29 Sep 2026US 12,747,556 B2Neenah Foundry Company
- Manhole lock system22 Sep 2026US 12,742,300 B2EJ USA, Inc.
- Lightweight molded covers and plates8 Sep 2026US 12,729,501 B2Hubbell Incorporated
- Sealed hatch assembly for underground enclosure18 Aug 2026US 12,709,859 B2
- Universal mount cover assembly for underground enclosures8 Oct 2026US 2026/0308865 A1Oldcastle Infrastructure, Inc.
- Smart manhole cover with radar level meter1 Oct 2026US 2026/0297884 A1Bvk Teknoloji Anonim Sirketi
- Utility handholes1 Oct 2026US 2026/0302753 A1AFL Telecommunications LLC
- In-ground utility access box and related methods1 Oct 2026US 2026/0302754 A1American Polymer Corporation
- Grade-level access system in underground enclosures24 Sep 2026US 2026/0286641 A1Oldcastle Infrastructure, Inc.
Most cited
By later US patents
- Underground service bay for vehicles and process for constructing same127US 5,701,706 A1997
- Waterproof pit cover78US 5,950,368 ADabico, Inc. · 1999
- Manhole security cover77US 8,674,830 B2McGard, Inc. · 2014
- Locking cover76US 5,324,135 A1994
- Manhole chimney seal72US 4,469,467 AThe Cretex Companies, Inc. · 1984