E04B 1/3447
Portal- or saddle-shaped structures
Official title: {Portal- or saddle-shaped structures}
E04B1/3447 (Portal- or saddle-shaped structures) appears on 23 US grants and 17 published applications in this corpus.
Search patents in E04B- Granted patents
- 23
- Published applications
- 17
- Assignees
- 15
- Inventors
- 35
- Latest grant
- 25 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 2 |
| 2016 | 1 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 1 |
| 2020 | 0 | 2 |
| 2021 | 3 | 1 |
| 2022 | 0 | 1 |
| 2023 | 1 | 2 |
| 2024 | 1 | 0 |
| 2025 | 1 | 4 |
By publication year. Applications have been published since 2001.
Recent patents
- Collapsible structure25 Mar 2025US 12,258,770 B2trac9, LLC
- Modular clearspan building, and modular building sections and construction methods therefor24 Sep 2024US 12,098,537 B2
- Collapsible structure28 Feb 2023US 11,591,819 B2trac9, LLC
- Portable erectable shelter22 Jun 2021US 11,041,324 B2International E-Z Up, Inc.
- Super fold playhouse1 Jun 2021US 11,020,681 B2KidKraft, Inc.
- A roof element and a shelter made from same2 Oct 2025US 2025/0305285 A1Wee.no AS
- Collapsible structure10 Jul 2025US 2025/0223828 A1trac9, LLC
- Prefabricated building systems with built-up structural elements29 May 2025US 2025/0172001 A1Folding Holdings, LLC
- Foldable physical structures22 May 2025US 2025/0163695 A1University of Maine System Board of Trustees
- Collapsible structure3 Aug 2023US 2023/0243177 A1trac9, LLC
Most cited
By later US patents
- Folding telescopic prefabricated framing units for non-load-bearing walls107US 5,735,100 A527233 B.C. Ltd. · 1998
- Framing system for building construction50US 6,318,044 B12001
- Method of erecting a foldable building module32US 3,971,185 A1976
- Prefabricated support and covering structure, particularly for constructing tunnels, bridges and the like22US 4,693,634 ATensiter S.p.A. · 1987
- Roofing method and apparatus19US 4,926,591 AAdviesbureau D3BN Civiel Ingenieurs · 1990