E04F 21/247
Used by an operator sitting on the trowel, i.e. ride-on power trowels
Official title: {used by an operator sitting on the trowel, i.e. ride-on power trowels}
E04F21/247 (Used by an operator sitting on the trowel, i.e. ride-on power trowels) appears on 92 US grants and 73 published applications in this corpus.
Search patents in E04F- Granted patents
- 92
- Published applications
- 73
- Assignees
- 26
- Inventors
- 94
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 3 |
| 2003 | 5 | 2 |
| 2004 | 0 | 1 |
| 2005 | 2 | 1 |
| 2006 | 4 | 1 |
| 2007 | 1 | 3 |
| 2008 | 2 | 2 |
| 2009 | 2 | 8 |
| 2010 | 7 | 6 |
| 2011 | 3 | 3 |
| 2012 | 4 | 2 |
| 2013 | 4 | 3 |
| 2014 | 1 | 0 |
| 2015 | 3 | 2 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 1 | 5 |
| 2019 | 1 | 0 |
| 2020 | 2 | 4 |
| 2021 | 3 | 7 |
| 2022 | 3 | 6 |
| 2023 | 5 | 6 |
| 2024 | 5 | 3 |
| 2025 | 4 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Decorative concrete with uniform surface and method of forming the same14 Apr 2026US 12,601,177 B2Shaw & Sons, Inc.
- Tool for the mechanical treatment of a concrete floor21 Oct 2025US 12,448,791 B2Concria Oy
- Battery powered hand-operated troweling machine7 Oct 2025US 12,435,527 B2
- Mounting adapter for concrete surface processing tools5 Aug 2025US 12,378,781 B2Wagman Metal Products, Inc.
- Flotation machine having pan support structure configured for conforming the shape of a float pan25 Mar 2025US 12,258,768 B2Multiquip, Inc.
- Motorized bump cutter assembly18 Jun 2026US 2026/0168266 A1
- Multi- engine hydraulic-drive power trowel12 Feb 2026US 2026/0043256 A1Multiquip, Inc.
- Autonomous power trowel system16 Oct 2025US 2025/0320733 A1UltraTrowel
- Electric Polisher for Concrete Surfaces20 Jun 2024US 2024/0198477 A1Allen Engineering Corporation
- Thermal management system for a drive train21 Mar 2024US 2024/0093513 A1Multiquip, Inc.
Most cited
By later US patents
- Spaced-rotor ride-type surface working machine with single-stick control of all movements58US 4,046,484 A1977
- Ride-type surface-working machines56US 3,936,212 A1976
- Light weight, fast steering riding trowel51US 5,108,220 AAllen Engineering Corporation · 1992
- Apparatus and method for improving the control of a concrete screed head assembly50US 7,044,681 B2Somero Enterprises, Inc. · 2006
- Variable width, twin engine riding trowel39US 5,480,258 AAllen Engineering Corporation · 1996