E04H 4/08
Coverings consisting of rigid elements
Official title: Coverings consisting of rigid elements {, e.g. coverings composed of separate or connected elements}
E04H4/08 (Coverings consisting of rigid elements) appears on 295 US grants and 284 published applications in this corpus.
Search patents in E04H- Granted patents
- 295
- Published applications
- 284
- Assignees
- 106
- Inventors
- 424
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 6 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 4 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 6 | 0 |
| 1996 | 6 | 0 |
| 1997 | 5 | 0 |
| 1998 | 7 | 0 |
| 1999 | 13 | 0 |
| 2000 | 7 | 0 |
| 2001 | 5 | 1 |
| 2002 | 6 | 4 |
| 2003 | 6 | 5 |
| 2004 | 5 | 13 |
| 2005 | 7 | 17 |
| 2006 | 8 | 14 |
| 2007 | 8 | 20 |
| 2008 | 7 | 11 |
| 2009 | 10 | 12 |
| 2010 | 3 | 13 |
| 2011 | 6 | 11 |
| 2012 | 7 | 7 |
| 2013 | 9 | 10 |
| 2014 | 6 | 11 |
| 2015 | 4 | 14 |
| 2016 | 11 | 15 |
| 2017 | 15 | 9 |
| 2018 | 6 | 9 |
| 2019 | 14 | 6 |
| 2020 | 14 | 14 |
| 2021 | 8 | 8 |
| 2022 | 9 | 12 |
| 2023 | 10 | 15 |
| 2024 | 12 | 22 |
| 2025 | 13 | 10 |
| 2026 | 4 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Spa cover lift system18 Aug 2026US 12,709,909 B2Strong Industries, Inc.
- Flexible closure for swimming pool skimmer19 May 2026US 12,631,036 B2
- Outdoor to indoor swimming pool apparatus7 Apr 2026US 12,595,650 B2A&C Future, Inc.
- Cover detection system for spas17 Mar 2026US 12,579,881 B2Sundance Spas, Inc.
- Spa cover lift2 Dec 2025US 12,486,686 B2Roberts Manufacturing LLC
- Automatic lift system for a spa covers6 Aug 2026US 2026/0226761 A1Strong Industries, Inc.
- Waste water cover kit18 Dec 2025US 2025/0382786 A1Enduro Composites, Inc.
- Hot tub and components thereof4 Dec 2025US 2025/0369244 A1
- System and Method to Convert Spa Cover Lifts to Electric13 Nov 2025US 2025/0347131 A1
- Pool cover assembly6 Nov 2025US 2025/0341107 A1
Most cited
By later US patents
- Pool solar power generator616US 9,847,749 B2Masimo Semiconductor, Inc. · 2017
- Lightweight insulated spa cover and method therefor192US 6,618,868 B22003
- Roll-up surface, system and method100US 7,090,430 B1Ground Floor Systems, LLC · 2006
- Cover for a hot tub or the like78US 4,853,985 A1989
- Interfitting plastic panels56US 5,411,782 A1995