B60D 1/345
The springs being of the bar or leaf type
Official title: {the springs being of the bar or leaf type}
B60D1/345 (The springs being of the bar or leaf type) appears on 63 US grants and 44 published applications in this corpus.
Search patents in B60D- Granted patents
- 63
- Published applications
- 44
- Assignees
- 26
- Inventors
- 70
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 0 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 1 | 1 |
| 2013 | 1 | 2 |
| 2014 | 2 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 0 |
| 2020 | 2 | 1 |
| 2021 | 1 | 7 |
| 2022 | 4 | 2 |
| 2023 | 9 | 16 |
| 2024 | 4 | 5 |
| 2025 | 0 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Automatic weight distribution system and method with continuous monitoring24 Sep 2024US 12,097,731 B2Dexter Axle Company
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- Weight distributing trailer hitch19 Dec 2024US 2024/0416694 A1Weigh Safe, LLC
- Spring Bar Coupling Device for a Weight Distributing Trailer Hitch8 Aug 2024US 2024/0262139 A1Weigh Safe, LLC
- Hitch assembly including a stabilizer for a trailer dolly8 Aug 2024US 2024/0262141 A1
- Dual-attachment system for a sway control hitch20 Jun 2024US 2024/0198743 A1Progress Mfg. Inc.
Most cited
By later US patents
- Trailer hitch58US 4,202,562 A1980
- Weight distributing hitch58US 5,465,991 AReese Products, Inc. · 1995
- Weight distributing hitch50US 5,375,867 AReese Products, Inc. · 1994
- Self-aligning, self-locking and self-leveling trailer hitch assembly45US 4,792,151 A1988
- Automatic trailer hitch system40US 5,580,076 A1996