E04F 21/1894
Lever-type lifters gripping the bottom edge of wall panels
Official title: {Lever-type lifters gripping the bottom edge of wall panels (door lifters B66F15/00)}
E04F21/1894 (Lever-type lifters gripping the bottom edge of wall panels) appears on 29 US grants and 27 published applications in this corpus.
Search patents in E04F- Granted patents
- 29
- Published applications
- 27
- Assignees
- 11
- Inventors
- 45
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 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 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 2 |
| 2002 | 0 | 2 |
| 2003 | 3 | 0 |
| 2004 | 2 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 2 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 2 |
| 2016 | 2 | 4 |
| 2017 | 3 | 1 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 2 |
| 2021 | 0 | 1 |
| 2022 | 2 | 2 |
| 2023 | 1 | 0 |
| 2024 | 1 | 1 |
| 2025 | 0 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems, methods and devices for processing and handling plasterboard21 Apr 2026US 12,605,838 B2EC8 Consulting Limited
- Cooler panel lifting assembly11 Jun 2024US 12,006,198 B2
- System and device for leveling and aligning tiles and method for use of same16 May 2023US 11,649,647 B2Acufloor, LLC
- System and device for leveling and aligning tiles and method for use of same9 Aug 2022US 11,408,186 B1Acufloor, LLC
- Method and apparatus for supporting sheeting materials14 Jun 2022US 11,359,389 B2
- Systems, methods and devices for processing and handling plasterboard27 Aug 2026US 2026/0249469 A1EC8 Consulting Limited
- Panel Lifting Device24 Jul 2025US 2025/0237071 A1Marshalltown Company
- Systems, methods and devices for processing and handling plasterboard6 Jun 2024US 2024/0181644 A1EC8 Consulting Limited
- System and device for leveling and aligning tiles and method for use of same8 Dec 2022US 2022/0389725 A1Acufloor, LLC
- System and device for leveling and aligning tiles and method for use of same11 Aug 2022US 2022/0251856 A1Acufloor, LLC
Most cited
By later US patents
- Device for levelling and aligning surface covering parts20US 9,482,018 B2Torrents Research, S.L. · 2016
- Portable wall system and method of installing same18US 3,967,420 APapsco, Inc. · 1976
- Materials handling device16US 4,138,099 A1979
- Carriage for a construction panel13US 6,579,051 B22003
- Foot mountable drywall positioning device12US 5,501,561 A1996