E02D 29/121
Characterised by the connection between shaft elements
Official title: {characterised by the connection between shaft elements, e.g. of rings forming said shaft}
E02D29/121 (Characterised by the connection between shaft elements) appears on 53 US grants and 40 published applications in this corpus.
Search patents in E02D- Granted patents
- 53
- Published applications
- 40
- Assignees
- 35
- Inventors
- 74
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 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 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 1 |
| 2002 | 3 | 0 |
| 2003 | 2 | 1 |
| 2004 | 2 | 3 |
| 2005 | 3 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 2 |
| 2011 | 2 | 3 |
| 2012 | 1 | 1 |
| 2013 | 2 | 3 |
| 2014 | 2 | 1 |
| 2015 | 2 | 1 |
| 2016 | 0 | 2 |
| 2017 | 1 | 0 |
| 2018 | 0 | 1 |
| 2019 | 2 | 4 |
| 2020 | 2 | 3 |
| 2021 | 4 | 3 |
| 2022 | 3 | 0 |
| 2023 | 2 | 1 |
| 2024 | 1 | 1 |
| 2025 | 1 | 2 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Height adjustable manhole cover4 Nov 2025US 12,460,369 B1
- Reinforcement method and reinforcement structure of a manhole3 Sep 2024US 12,077,929 B2Nippon Telegraph and Telephone Corporation
- Riser sections and risers made therefrom22 Aug 2023US 11,732,433 B1
- Adjustable pit extension assembly6 Jun 2023US 11,668,078 B2The Ford Meter Box Company, Inc.
- Adjustable in-ground utilities box assembly22 Nov 2022US 11,509,125 B1
- Wall element for a side wall of a manhole17 Sep 2026US 2026/0275675 A1LANGMATZ GmbH
- Wall element for a sidewall of a manhole17 Sep 2026US 2026/0275676 A1LANGMATZ GmbH
- Arrangement applied to dismountable modular junction box with back pressure fittings9 Apr 2026US 2026/0098391 A1
- Manhole construction4 Sep 2025US 2025/0277349 A1Advanced Drainage Systems, Inc.
- Manhole construction14 Aug 2025US 2025/0257545 A1Advanced Drainage Systems, Inc.
Most cited
By later US patents
- Underground reinforced plastic enclosure69US 3,974,599 AIndian Head Inc. · 1976
- Manhole adjusting extension member52US 5,956,905 A1999
- Stackable riser for on-site waste and drainage systems48US 5,617,679 ATuf-Tite, Inc. · 1997
- Corrosion resistant leakproof plastic manhole system46US 5,386,669 A1995
- Reinforced structure for below-grade housing of equipment45US 5,791,098 ACott Manufacturing Company · 1998