E04G 21/3228
Folding railings for flat roof edge
Official title: {Folding railings for flat roof edge, e.g. to hide the railings from view when not in use}
E04G21/3228 (Folding railings for flat roof edge) appears on 22 US grants and 35 published applications in this corpus.
Search patents in E04G- Granted patents
- 22
- Published applications
- 35
- Assignees
- 15
- Inventors
- 48
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 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 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 2 | 0 |
| 2014 | 1 | 2 |
| 2015 | 0 | 3 |
| 2016 | 1 | 1 |
| 2017 | 2 | 5 |
| 2018 | 1 | 5 |
| 2019 | 2 | 1 |
| 2020 | 2 | 3 |
| 2021 | 2 | 2 |
| 2022 | 0 | 3 |
| 2023 | 3 | 2 |
| 2024 | 1 | 1 |
| 2025 | 3 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Portable rooftop guardrail assembly28 Apr 2026US 12,612,794 B1USA Corporate Holding, Inc.
- Edge protection system21 Oct 2025US 12,448,796 B2
- Collapsible guardrail14 Oct 2025US 12,442,205 B2The Boeing Company
- Arrangement27 May 2025US 12,312,814 B2Sandvik Mining and Construction Oy
- Safety gate27 Aug 2024US 12,071,777 B2Global Engineers Technology Pte. Ltd.
- Arrangement21 Aug 2025US 2025/0263932 A1Sandvik Mining and Construction Oy
- Collapsible guardrails15 May 2025US 2025/0154781 A1The Boeing Company
- Temporary perimeter containment assembly22 Feb 2024US 2024/0060319 A1WORTHDOWN PTY LTD atf Ausrica C Trust
- Edge protection system28 Dec 2023US 2023/0417073 A1
- Collapsible Gate24 Aug 2023US 2023/0264925 A1
Most cited
By later US patents
- Support for the handrail of a detachable handrail unit34US 4,909,483 AAlprokon Promotie en Dontwikkeling B.V. · 1990
- Collapsible safety rail system14US 8,689,938 B22014
- Hatchway safety grab post safety barrier and grate7US 8,517,144 B22013
- Vertically raising safety rail7US 9,745,762 B2Control Dynamics, Inc. · 2017
- Folding guard rail method and apparatus6US 9,617,747 B22017