E04F 11/00
Stairways, ramps, or like structures
Official title: Stairways, ramps, or like structures (mounting or marking-off stairways E04F21/26; of temporary {use during building} construction E04G27/00; means for facilitating access to swimming pools E04H4/144; {means for facilitating access to swimming pools E04H4/144; appliances for aiding patients or disabled persons to walk A61H3/00}); Balustrades; Handrails (ladders permanently attached to fixed structures E06C9/00)
E04F11/00 (Stairways, ramps, or like structures) appears on 2,101 US grants and 1,961 published applications in this corpus.
Search patents in E04F- Granted patents
- 2,101
- Published applications
- 1,961
- Assignees
- 926
- Inventors
- 3,129
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 24 | 0 |
| 1977 | 28 | 0 |
| 1978 | 25 | 0 |
| 1979 | 18 | 0 |
| 1980 | 12 | 0 |
| 1981 | 21 | 0 |
| 1982 | 23 | 0 |
| 1983 | 27 | 0 |
| 1984 | 13 | 0 |
| 1985 | 23 | 0 |
| 1986 | 22 | 0 |
| 1987 | 22 | 0 |
| 1988 | 16 | 0 |
| 1989 | 35 | 0 |
| 1990 | 23 | 0 |
| 1991 | 26 | 0 |
| 1992 | 31 | 0 |
| 1993 | 22 | 0 |
| 1994 | 31 | 0 |
| 1995 | 26 | 0 |
| 1996 | 27 | 0 |
| 1997 | 28 | 0 |
| 1998 | 44 | 0 |
| 1999 | 32 | 0 |
| 2000 | 62 | 0 |
| 2001 | 41 | 10 |
| 2002 | 44 | 55 |
| 2003 | 46 | 63 |
| 2004 | 44 | 75 |
| 2005 | 42 | 78 |
| 2006 | 33 | 78 |
| 2007 | 28 | 70 |
| 2008 | 31 | 78 |
| 2009 | 37 | 79 |
| 2010 | 36 | 69 |
| 2011 | 51 | 75 |
| 2012 | 49 | 62 |
| 2013 | 48 | 75 |
| 2014 | 73 | 80 |
| 2015 | 63 | 78 |
| 2016 | 52 | 85 |
| 2017 | 93 | 60 |
| 2018 | 60 | 94 |
| 2019 | 75 | 92 |
| 2020 | 70 | 107 |
| 2021 | 67 | 93 |
| 2022 | 73 | 102 |
| 2023 | 84 | 84 |
| 2024 | 70 | 80 |
| 2025 | 77 | 77 |
| 2026 | 53 | 62 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Stair assistance device29 Sep 2026US 12,747,591 B2Topro Industri AS
- Vertical cable railing assembly29 Sep 2026US 12,747,773 B2Digger Specialties, Inc.
- Fall control system and method of controlling a movement during fall22 Sep 2026US 12,740,910 B22Innovate LLC
- Adjustable stair railing post assembly22 Sep 2026US 12,742,327 B2PrimeSource Building Products, Inc.
- Foldable stair assembly8 Sep 2026US 12,728,899 B2Safesmart LLC
- Book matched stair tread and method of manufacture1 Oct 2026US 2026/0297953 A1
- Upright Structure Assembly for Flooring System1 Oct 2026US 2026/0297954 A1Ryno Ltd.
- Railing covering device1 Oct 2026US 2026/0297955 A11406459 B.C. Ltd.
- Single mount tensioner and wire attachment system1 Oct 2026US 2026/0297956 A1Suncor Stainless, Inc.
- Modular inclined positionable ramp24 Sep 2026US 2026/0286706 A1
Most cited
By later US patents
- Integrally formed linear light strip with light emitting diodes362US 5,848,837 AStanTech · 1998
- Glider bar for flooring system220US 6,134,854 APerstorp AB · 2000
- Integrally formed linear light strip with light emitting diodes207US 5,927,845 AStanTech · 1999
- Portable dance floor196US 5,634,309 A1997
- Emergency lighting strip157US 5,130,909 AWickes Manufacturing Company · 1992