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E04F 11/1808

Handrail members

Official title: {Handrail members; Connections between handrail members}

E04F11/1808 (Handrail members) appears on 54 US grants and 72 published applications in this corpus.

Search patents in E04F

Granted patents: 54
Published applications: 72
Assignees: 44
Inventors: 108
Latest grant: 8 Sep 2026

Filings by year

E04F 11/1808: granted patents and published applications per publication year
Year	Granted patents	Published applications
1980	1	0
1981	1	0
1982	0	0
1983	0	0
1984	0	0
1985	0	0
1986	0	0
1987	0	0
1988	0	0
1989	0	0
1990	0	0
1991	0	0
1992	0	0
1993	1	0
1994	0	0
1995	1	0
1996	0	0
1997	0	0
1998	0	0
1999	0	0
2000	0	0
2001	1	0
2002	0	1
2003	0	2
2004	0	0
2005	0	0
2006	0	0
2007	0	1
2008	0	1
2009	0	1
2010	0	1
2011	1	3
2012	1	1
2013	1	2
2014	2	5
2015	2	5
2016	2	3
2017	6	2
2018	4	6
2019	3	4
2020	4	6
2021	2	6
2022	4	6
2023	4	5
2024	2	4
2025	8	6
2026	3	1

By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.

Recent patents

Training hand rail8 Sep 2026US 12,729,540 B2
Stair navigation assist system12 May 2026US 12,622,837 B2University of Pittsburgh—Of the Commonwealth System of Higher Education
Handrail for railroad vehicle and method for changing natural frequency of said handrail24 Mar 2026US 12,583,374 B2Kawasaki Railcar Manufacturing Co., Ltd.
Tubular member flange attachment and methods of attaching a flange to a tubular member30 Dec 2025US 12,508,642 B2Bobrick Washroom Equipment, Inc.
Dual-axis swivel bracket9 Dec 2025US 12,492,560 B2Key-Link Fencing & Railing, Inc.

Most cited

By later US patents