A01B 21/00
Harrows with rotary non-driven tools
A01B21/00 (Harrows with rotary non-driven tools) appears on 226 US grants and 187 published applications in this corpus.
Search patents in A01B- Granted patents
- 226
- Published applications
- 187
- Assignees
- 83
- Inventors
- 298
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 6 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 4 |
| 2003 | 3 | 0 |
| 2004 | 1 | 2 |
| 2005 | 2 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 4 |
| 2009 | 3 | 1 |
| 2010 | 1 | 7 |
| 2011 | 6 | 7 |
| 2012 | 3 | 3 |
| 2013 | 5 | 8 |
| 2014 | 6 | 2 |
| 2015 | 2 | 18 |
| 2016 | 11 | 13 |
| 2017 | 9 | 4 |
| 2018 | 7 | 9 |
| 2019 | 8 | 17 |
| 2020 | 16 | 21 |
| 2021 | 11 | 20 |
| 2022 | 14 | 11 |
| 2023 | 13 | 5 |
| 2024 | 7 | 13 |
| 2025 | 11 | 12 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System and method for reducing or preventing plugging of an agricultural implement6 Oct 2026US 12,751,343 B2CNH Industrial America LLC
- System and method for detecting disk plugging on an agricultural implement25 Aug 2026US 12,714,000 B2CNH Industrial America LLC
- Implement tool angle control system7 Jul 2026US 12,672,594 B2Deere & Company
- System and method for detecting disk plugging on a tillage implement9 Jun 2026US 12,648,506 B2CNH Industrial America LLC
- Gang assembly for a tillage implement19 May 2026US 12,628,720 B2CNH Industrial America LLC
- Multi-member agricultural machine for processing the ground1 Oct 2026US 2026/0293793 A1
- Agricultural drill/planter/coulter/disc blade with step plane notch edge18 Jun 2026US 2026/0165220 A1Osmundson Mfg. Co.
- Agricultural implements comprising inertial sensors and related systems and methods11 Jun 2026US 2026/0157265 A1AGCO Corporation
- Agricultural tillage implement and assemblies21 May 2026US 2026/0137016 A1K S Paterson Nominees Pty Ltd
- Disc mounting assembly for a vertical tillage implement26 Feb 2026US 2026/0053079 A1
Most cited
By later US patents
- Tillage implement with on-the-go angle and depth controlled discs81US 5,878,821 A1999
- Rotary hoe77US 5,419,402 A1995
- Rotary hoe extension70US 5,190,112 AYetter Manufacturing Company · 1993
- Subsoil plow point63US 4,538,689 ADMI, Inc. · 1985
- Hydraulic down pressure control system for an agricultural implement60US 8,776,702 B2Dawn Equipment Company · 2014