E04F 11/1863
Built-in aids for ascending or descending stairs
Official title: {Built-in aids for ascending or descending stairs (lifts associated with stairs B66B9/08)}
E04F11/1863 (Built-in aids for ascending or descending stairs) appears on 53 US grants and 56 published applications in this corpus.
Search patents in E04F- Granted patents
- 53
- Published applications
- 56
- Assignees
- 21
- Inventors
- 111
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 4 |
| 2004 | 0 | 2 |
| 2005 | 2 | 2 |
| 2006 | 2 | 7 |
| 2007 | 1 | 1 |
| 2008 | 2 | 5 |
| 2009 | 0 | 3 |
| 2010 | 0 | 2 |
| 2011 | 3 | 2 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 3 |
| 2015 | 2 | 2 |
| 2016 | 0 | 3 |
| 2017 | 2 | 0 |
| 2018 | 2 | 2 |
| 2019 | 0 | 2 |
| 2020 | 0 | 1 |
| 2021 | 1 | 6 |
| 2022 | 2 | 1 |
| 2023 | 2 | 0 |
| 2024 | 1 | 1 |
| 2025 | 0 | 3 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Stair assistance device29 Sep 2026US 12,747,591 B2Topro Industri AS
- Fall control system and method of controlling a movement during fall22 Sep 2026US 12,740,910 B22Innovate LLC
- Stair navigation assist system12 May 2026US 12,622,837 B2University of Pittsburgh—Of the Commonwealth System of Higher Education
- Power assistive device for stair ascent and descent3 Dec 2024US 12,156,844 B2The Board of Trustees of The University of Alabama
- Telescopic staircase system and uses thereof12 Sep 2023US 11,753,829 B2Metaltech-Omega Inc.
- Stair Railing System9 Oct 2025US 2025/0314073 A1
- Adjustable mounting system for accessibility devices and other arrangements5 Jun 2025US 2025/0179806 A1University of Pittsburgh—Of the Commonwealth System of Higher Education
- Stair assistance device23 Jan 2025US 2025/0027320 A1Topro Industri AS
- Stair navigation assist system28 Mar 2024US 2024/0099924 A1University of Pittsburgh—Of the Commonwealth System of Higher Education
- Extendable rail system for heliports3 Feb 2022US 2022/0034095 A1
Most cited
By later US patents
- Motorized portable system and method for aiding persons in ascending or descending stairways28US 5,269,227 A1993
- Stairway safety bars26US 5,022,197 A1991
- UV curing method and apparatus25US 7,211,299 B2Con-Trol-Cure, Inc. · 2007
- Adjustable stair railing22US 5,657,968 A1997
- Handrail for toddlers20US 4,556,201 A1985