A01F 12/52
Arrangements for returning unthreshed grain to the threshing device
A01F12/52 (Arrangements for returning unthreshed grain to the threshing device) appears on 53 US grants and 42 published applications in this corpus.
Search patents in A01F- Granted patents
- 53
- Published applications
- 42
- Assignees
- 16
- Inventors
- 113
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 2 | 4 |
| 2006 | 3 | 1 |
| 2007 | 1 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 4 |
| 2010 | 2 | 0 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 3 |
| 2015 | 0 | 0 |
| 2016 | 3 | 2 |
| 2017 | 1 | 3 |
| 2018 | 3 | 2 |
| 2019 | 1 | 3 |
| 2020 | 3 | 3 |
| 2021 | 1 | 5 |
| 2022 | 3 | 2 |
| 2023 | 1 | 3 |
| 2024 | 5 | 0 |
| 2025 | 2 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System and method for controlling threshing assembly operation of an agricultural harvester9 Jun 2026US 12,648,522 B2CNH Industrial Brasil Ltda.
- Return pan for an agricultural combine21 Oct 2025US 12,446,489 B2AGCO International GmbH
- Sieve chutes for a lower sieve of an agricultural combine1 Apr 2025US 12,262,661 B1
- Closed loop control of tailings processor aggressiveness26 Nov 2024US 12,150,413 B2CNH Industrial America LLC
- Grain cleaning system and method of controlling such5 Nov 2024US 12,133,484 B2AGCO International GmbH
- Bypass system for determining separator grain loss16 Jul 2026US 2026/0198420 A1Deere & Company
- Method for calibrating a tailings return sensor in a combine harvester21 May 2026US 2026/0137028 A1CNH Industrial Belgium N. V.
- Active return tube and method of controlling same10 Jul 2025US 2025/0221343 A1Deere & Company
- Power transmission applicable in a combine harvester15 May 2025US 2025/0151659 A1CNH Industrial Belgium N. V.
- Threshing Apparatus and Harvester10 Aug 2023US 2023/0247943 A1Kubota Corporation
Most cited
By later US patents
- Tailings distribution control for harvester32US 8,282,453 B1CNH America LLC · 2012
- Feed residue saver for combines28US 4,188,160 A1980
- Pneumatic material handling system for combines19US 4,441,511 A1984
- Tailings return to threshing section or to cleaning section19US 4,466,447 AAllis-Chalmers Corporation · 1984
- Tailings monitor for an agricultural combine19US 6,053,811 ACase Corporation · 2000