E04C
Structural elements
Official title: STRUCTURAL ELEMENTS; BUILDING MATERIALS (for bridges E01D; specially designed for insulation or other protection E04B; elements used as building aids E04G; for mining E21; for tunnels E21D; structural elements with broader range of application than for building engineering F16, particularly F16S)
E04C (Structural elements) appears on 13,206 US grants and 12,287 published applications in this corpus.
Search patents in E04C- Granted patents
- 13,206
- Published applications
- 12,287
- Assignees
- 5,751
- Inventors
- 19,803
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 182 | 0 |
| 1977 | 201 | 0 |
| 1978 | 183 | 0 |
| 1979 | 92 | 0 |
| 1980 | 124 | 0 |
| 1981 | 139 | 0 |
| 1982 | 135 | 0 |
| 1983 | 127 | 0 |
| 1984 | 138 | 0 |
| 1985 | 141 | 0 |
| 1986 | 166 | 0 |
| 1987 | 178 | 0 |
| 1988 | 128 | 0 |
| 1989 | 150 | 0 |
| 1990 | 183 | 0 |
| 1991 | 186 | 0 |
| 1992 | 154 | 0 |
| 1993 | 165 | 0 |
| 1994 | 190 | 0 |
| 1995 | 198 | 0 |
| 1996 | 215 | 0 |
| 1997 | 237 | 0 |
| 1998 | 282 | 0 |
| 1999 | 260 | 0 |
| 2000 | 256 | 0 |
| 2001 | 302 | 91 |
| 2002 | 255 | 332 |
| 2003 | 252 | 341 |
| 2004 | 253 | 483 |
| 2005 | 217 | 423 |
| 2006 | 183 | 414 |
| 2007 | 140 | 399 |
| 2008 | 134 | 435 |
| 2009 | 156 | 441 |
| 2010 | 281 | 453 |
| 2011 | 270 | 439 |
| 2012 | 306 | 440 |
| 2013 | 338 | 519 |
| 2014 | 447 | 636 |
| 2015 | 452 | 657 |
| 2016 | 485 | 629 |
| 2017 | 488 | 654 |
| 2018 | 470 | 600 |
| 2019 | 557 | 666 |
| 2020 | 557 | 621 |
| 2021 | 466 | 564 |
| 2022 | 395 | 521 |
| 2023 | 451 | 446 |
| 2024 | 394 | 450 |
| 2025 | 362 | 350 |
| 2026 | 185 | 283 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
Recent patents
- Method for constructing concrete block structure6 Oct 2026US 12,753,564 B2Yujoo Co., Ltd.
- System and method for maintaining a metal lintel in a masonry wall6 Oct 2026US 12,753,600 B2Craft Pro Masonry Restorations, Inc.
- Wall panel and method for manufacturing such a wall panel6 Oct 2026US 12,753,605 B2Carbon Capture Buildings Greentech
- Hoistway mechanics of panoramic vacuum elevator29 Sep 2026US 12,747,136 B2Blissera Corp.
- Masonry system29 Sep 2026US 12,747,583 B2Associacao Blc3—Campus De Tecnologia E Inovacao
- Pretensioned greenhouse panels8 Oct 2026US 2026/0305539 A1Sensei AG Holdings, Inc.
- Frp rebar forming apparatus8 Oct 2026US 2026/0307342 A1Tsudakoma Kogyo Kabushiki Kaisha
- Hardened body of hydraulic composition8 Oct 2026US 2026/0308056 A1Kuraray Co., Ltd.
- Drywall Spacing Joist Hanger8 Oct 2026US 2026/0308903 A1
- Fire-Resistant Building Panels8 Oct 2026US 2026/0308909 A1Envirograf Ltd
Most cited
By later US patents
- Box formed building panel of extruded plastic397US 4,299,070 A1981
- Interlocking panels having flats for increased versatility394US 5,502,939 AElite Panel Products · 1996
- Splines for joining panels387US 5,950,389 A1999
- Sandwich elements in the form of slabs, shells and the like383US 5,348,778 ABayer Aktiengesellschaft · 1994
- Resilient groove369US 7,584,583 B2Välinge Innovation AB · 2009