E04G 21/121
Construction of stressing jacks
Official title: {Construction of stressing jacks}
E04G21/121 (Construction of stressing jacks) appears on 61 US grants and 33 published applications in this corpus.
Search patents in E04G- Granted patents
- 61
- Published applications
- 33
- Assignees
- 38
- Inventors
- 97
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 1 |
| 2003 | 3 | 0 |
| 2004 | 1 | 3 |
| 2005 | 1 | 3 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 1 |
| 2009 | 1 | 1 |
| 2010 | 3 | 1 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 2 | 2 |
| 2015 | 2 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 3 |
| 2018 | 2 | 4 |
| 2019 | 1 | 2 |
| 2020 | 3 | 1 |
| 2021 | 0 | 0 |
| 2022 | 2 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 3 | 3 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Lightweight dual action post-tensioning jack with two handle chuck30 Dec 2025US 12,509,893 B2
- Methods and systems for monitoring stress in a tendon in concrete post-tensioning28 Oct 2025US 12,455,582 B2
- Automatic leveling carbon fiber reinforced polymer (CFRP) plate pre-stressing and tensioning devices for curved surface structures25 Feb 2025US 12,234,661 B1Fujian University of Technology
- Method for producing a textile-reinforced construction material component, and tensioning device for same14 Jun 2022US 11,358,305 B2Solidian GmbH
- Method of de-tensioning a rod3 May 2022US 11,319,715 B2FDH Infrastructure Services, LLC
- Methods and systems for monitoring stress in a tendon in concrete post-tensioning29 Jan 2026US 2026/0029808 A1
- Methods and systems for monitoring stress10 Jul 2025US 2025/0224747 A1
- Lightweight dual action post-tensioning jack with two handle chuck12 Jun 2025US 2025/0188757 A1
- Method, system, and device for pre-tensioning concrete15 May 2025US 2025/0153392 A1
- Systems and methods for a smart cable tensioning unit11 Jul 2024US 2024/0229482 A9Hamilton Form Co., Inc.
Most cited
By later US patents
- Method and apparatus for retensioning prestressed concrete members45US 4,604,003 A1986
- Apparatus for forming a dead-end anchorage of a post-tension system38US 6,513,287 B12003
- Method of tensioning a tension member composed of a plurality of individual elements24US 5,809,710 ADyckerhoff & Widmann Aktiengesellschaft · 1998
- Methods and devices for placing multiple strand cables under tension21US 5,083,469 AFreyssinet International (STUP) · 1992
- Prestressed concrete tensioning system20US 5,718,090 A1998