B66D 3/24
Applications of limit switches
B66D3/24 (Applications of limit switches) appears on 23 US grants and 21 published applications in this corpus.
Search patents in B66D- Granted patents
- 23
- Published applications
- 21
- Assignees
- 20
- Inventors
- 60
- Latest grant
- 18 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 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 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 3 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 2 | 1 |
| 2020 | 0 | 2 |
| 2021 | 1 | 3 |
| 2022 | 2 | 3 |
| 2023 | 0 | 2 |
| 2024 | 2 | 2 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Apparatus and method for loading and unloading cargo of air mobility18 Nov 2025US 12,473,088 B2Hyundai Motor Company
- Upper and lower limit detecting apparatus and method for electric chain block4 Nov 2025US 12,460,980 B2Kito Corporation
- Hoist6 Aug 2024US 12,054,369 B2Kito Corporation
- Winch delivery system12 Mar 2024US 11,926,418 B2Flyby Robotics, Inc.
- Remote controlled lift assembly5 Jul 2022US 11,377,330 B2
- Portable winch24 Jul 2025US 2025/0237276 A1Warn Industries, Inc.
- Upper and lower limit detecting apparatus and method for electric chain block1 Feb 2024US 2024/0035907 A1Kito Corporation
- Automatic method for determining a physical end-of-travel position of a reeve-block of a tower crane18 Jan 2024US 2024/0017969 A1Manitowoc Crane Group France SAS
- Apparatus and method for loading and unloading cargo of air mobility24 Aug 2023US 2023/0264816 A1Hyundai Motor Company
- Winch delivery system6 Jul 2023US 2023/0211883 A1Flyby Robotics, Inc.
Most cited
By later US patents
- Hoist control with limit switches22US 3,960,362 AEaton Corporation · 1976
- Anti-two block device16US 5,263,660 AIowa Mold Tooling Co., Inc. · 1993
- Hoist with proximity limit switches14US 6,135,421 AMHE Technologies, Inc. · 2000
- Air balance hoist with load position indicator10US 5,492,306 AKnight Industries, Inc. · 1996
- Belt hoist7US 6,003,843 AElephant Chain Block Company Limited · 1999