E04C 3/04
Of metal
Official title: of metal (E04C3/29 takes precedence; as reinforcing elements E04C5/06; manufacture B21)
E04C3/04 (Of metal) appears on 1,669 US grants and 1,782 published applications in this corpus.
Search patents in E04C- Granted patents
- 1,669
- Published applications
- 1,782
- Assignees
- 852
- Inventors
- 2,546
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 13 | 0 |
| 1978 | 8 | 0 |
| 1979 | 6 | 0 |
| 1980 | 4 | 0 |
| 1981 | 8 | 0 |
| 1982 | 12 | 0 |
| 1983 | 7 | 0 |
| 1984 | 9 | 0 |
| 1985 | 21 | 0 |
| 1986 | 15 | 0 |
| 1987 | 25 | 0 |
| 1988 | 10 | 0 |
| 1989 | 8 | 0 |
| 1990 | 16 | 0 |
| 1991 | 15 | 0 |
| 1992 | 14 | 0 |
| 1993 | 10 | 0 |
| 1994 | 17 | 0 |
| 1995 | 24 | 0 |
| 1996 | 21 | 0 |
| 1997 | 23 | 0 |
| 1998 | 31 | 0 |
| 1999 | 31 | 0 |
| 2000 | 30 | 0 |
| 2001 | 30 | 11 |
| 2002 | 33 | 48 |
| 2003 | 31 | 39 |
| 2004 | 35 | 76 |
| 2005 | 23 | 68 |
| 2006 | 21 | 61 |
| 2007 | 21 | 75 |
| 2008 | 15 | 66 |
| 2009 | 28 | 67 |
| 2010 | 47 | 60 |
| 2011 | 39 | 61 |
| 2012 | 40 | 74 |
| 2013 | 42 | 64 |
| 2014 | 81 | 92 |
| 2015 | 58 | 96 |
| 2016 | 75 | 83 |
| 2017 | 81 | 89 |
| 2018 | 70 | 88 |
| 2019 | 95 | 128 |
| 2020 | 92 | 91 |
| 2021 | 70 | 75 |
| 2022 | 52 | 73 |
| 2023 | 80 | 61 |
| 2024 | 52 | 65 |
| 2025 | 47 | 39 |
| 2026 | 18 | 32 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E04C 2003/0404Beams, girders, or joists characterised by cross-sectional aspectsIndexing code1,129
- E04C 3/06With substantially solid, i.e. unapertured, web682
- E04C 3/08With apertured web604
- E04C 2003/0486Truss like structures composed of separate truss elementsIndexing code521
- E04C 3/11With non-parallel upper and lower edges161
- E04C 3/10Prestressed40
Recent patents
- Purlin construction with water flow system for flat panels22 Sep 2026US 12,742,324 B2
- Composite open web beam-joist and method of manufacture15 Sep 2026US 12,735,892 B2B&H Solutions LLC
- Attachment systems for pultruded, extruded, and molded parts25 Aug 2026US 12,715,520 B2Zephyros, Inc.
- Load bearing system for a residential structure25 Aug 2026US 12,716,228 B2NxGen Homes Pty Ltd
- Irrigation system having improved construction system and adjustable crown height18 Aug 2026US 12,708,077 B2Reinke Manufacturing Co., Inc.
- Automated systems and methods for truss assemblies in the construction of modular buildings1 Oct 2026US 2026/0295896 A1Buildz, LLC
- Truss system with back to back angle irons24 Sep 2026US 2026/0286701 A1
- Joist table systems and methods24 Sep 2026US 2026/0286702 A1Nucor Corporation
- Multi-chamber closed structural element and method of manufacturing a multi-chamber closed structural element10 Sep 2026US 2026/0266052 A1Zieta Prozessdesign SpóLka Z Ograniczona Odpowiedzialnoscia
- Support structures for solar tracker systems with increased tolerance27 Aug 2026US 2026/0254398 A1
Most cited
By later US patents
- Mounting rail212US 5,927,041 AHilti Aktiengesellschaft · 1999
- Metal frames168US 5,157,883 A1992
- Wall frame structure168US 5,325,651 AUniframes Holdings Pty Limited · 1994
- Interior shaft wall construction153US 5,950,385 A1999
- Pre-spaced time-saving track for mounting studs for construction of drywall and other wall surfaces148US 5,797,233 A1998