E04H 4/0031
With shell type elements
Official title: {with shell type elements}
E04H4/0031 (With shell type elements) appears on 100 US grants and 112 published applications in this corpus.
Search patents in E04H- Granted patents
- 100
- Published applications
- 112
- Assignees
- 53
- Inventors
- 170
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 2 |
| 2003 | 1 | 0 |
| 2004 | 0 | 3 |
| 2005 | 3 | 3 |
| 2006 | 0 | 3 |
| 2007 | 0 | 4 |
| 2008 | 1 | 3 |
| 2009 | 0 | 3 |
| 2010 | 2 | 0 |
| 2011 | 1 | 3 |
| 2012 | 0 | 1 |
| 2013 | 0 | 2 |
| 2014 | 2 | 6 |
| 2015 | 5 | 3 |
| 2016 | 4 | 4 |
| 2017 | 6 | 8 |
| 2018 | 1 | 7 |
| 2019 | 11 | 5 |
| 2020 | 3 | 3 |
| 2021 | 5 | 9 |
| 2022 | 4 | 11 |
| 2023 | 11 | 10 |
| 2024 | 7 | 6 |
| 2025 | 6 | 11 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Spa shell for a spa having thermally insulated sections8 Sep 2026US 12,729,553 B2Masterspas, LLC
- Plunge pool25 Aug 2026US 12,716,254 B2Plungie IP Pty Ltd
- Spa frame7 Apr 2026US 12,595,671 B2Sundance Spas, Inc.
- Tanning ledge structure for a fiberglass swimming pool17 Mar 2026US 12,577,799 B2Thursday Pools
- Spa having drain system for improved water circulation30 Dec 2025US 12,509,896 B2Strong Industries, Inc.
- Method and system for providing connectivity for a bathing unit system16 Apr 2026US 2026/0102315 A1Gecko Alliance Group Inc.
- Fiber-reinforced polymer (frp) composite swimming pools and method of constructing frp composite swimming pools19 Mar 2026US 2026/0078595 A1
- Reconfigurable spa filter treatment systems and methods for treating filtered water for spas and hot tubs25 Dec 2025US 2025/0389130 A1Saratoga Spa & Bath Co., Inc.
- Hot tub and components thereof4 Dec 2025US 2025/0369244 A1
- Mould and method for manufacturing a swimming pool or swimming pond or the like17 Jul 2025US 2025/0229465 A1Impoolse BV
Most cited
By later US patents
- Truck pool apparatus74US 5,201,562 A1993
- Hydrothermal treatment facility42US 4,466,141 A1984
- Spa with recessed filter chamber32US 4,552,658 AW. W. Adcock, Inc. · 1985
- Recreational pool26US 4,642,822 ANorca Industries Limited · 1987
- Swimming pool/spa integrated structure24US 5,727,264 AFox Pool Corporation · 1998