B66B 1/28
Electrical
Official title: electrical (detecting excessive speed B66B5/04 {; control of electrical motor H02P})
B66B1/28 (Electrical) appears on 943 US grants and 881 published applications in this corpus.
Search patents in B66B- Granted patents
- 943
- Published applications
- 881
- Assignees
- 155
- Inventors
- 1,387
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 8 | 0 |
| 1978 | 20 | 0 |
| 1979 | 5 | 0 |
| 1980 | 7 | 0 |
| 1981 | 11 | 0 |
| 1982 | 11 | 0 |
| 1983 | 9 | 0 |
| 1984 | 13 | 0 |
| 1985 | 14 | 0 |
| 1986 | 16 | 0 |
| 1987 | 17 | 0 |
| 1988 | 18 | 0 |
| 1989 | 9 | 0 |
| 1990 | 12 | 0 |
| 1991 | 15 | 0 |
| 1992 | 7 | 0 |
| 1993 | 11 | 0 |
| 1994 | 12 | 0 |
| 1995 | 14 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 9 | 0 |
| 1999 | 19 | 0 |
| 2000 | 4 | 0 |
| 2001 | 8 | 14 |
| 2002 | 23 | 6 |
| 2003 | 5 | 3 |
| 2004 | 4 | 6 |
| 2005 | 2 | 4 |
| 2006 | 5 | 7 |
| 2007 | 5 | 11 |
| 2008 | 7 | 10 |
| 2009 | 7 | 23 |
| 2010 | 17 | 26 |
| 2011 | 17 | 30 |
| 2012 | 21 | 16 |
| 2013 | 19 | 28 |
| 2014 | 24 | 16 |
| 2015 | 12 | 25 |
| 2016 | 23 | 34 |
| 2017 | 21 | 92 |
| 2018 | 44 | 88 |
| 2019 | 54 | 95 |
| 2020 | 56 | 95 |
| 2021 | 50 | 72 |
| 2022 | 59 | 69 |
| 2023 | 47 | 28 |
| 2024 | 47 | 35 |
| 2025 | 44 | 27 |
| 2026 | 45 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Conveyance system with regenerative drive6 Oct 2026US 12,753,042 B2Otis Elevator Company
- Time-based system and method for determining suspension member elongation15 Sep 2026US 12,735,296 B2Otis Elevator Company
- Method for controlling an elevator1 Sep 2026US 12,722,936 B2Kone Corporation
- Elevator system including wireless power transfer1 Sep 2026US 12,722,937 B2Otis Elevator Company
- Elevator safety monitoring system, elevator system, elevator drive unit, and method for operating an elevator18 Aug 2026US 12,709,518 B2Kone Corporation
- System and methods for reutilization of elevator's traveling cable on modernizations8 Oct 2026US 2026/0307937 A1Kone Corporation
- Elevator system with control signal isolation during safe torque off10 Sep 2026US 2026/0265018 A1Otis Elevator Company
- Machine room-less elevator traction system and elevator equipment10 Sep 2026US 2026/0265022 A1Otis Elevator Company
- Arrangement for operating an elevator27 Aug 2026US 2026/0250100 A1Kone Corporation
- Elevator system having enhanced elevator car deceleration13 Aug 2026US 2026/0233971 A1Otis Elevator Company
Most cited
By later US patents
- Control device for controlling a controlled apparatus, and a control method therefor101US 5,430,642 AHitachi, Ltd. · 1995
- Display control apparatus for elevator91US 4,749,062 AMitsubishi Denki Kabushiki Kaisha · 1988
- Apparatus and method for controlling operation of elevator in power failure69US 6,315,081 B1LG Industrial Systems Co., Ltd. · 2001
- Safety mechanism for preventing unintended motion in traction elevators57US 4,923,055 ADelaware Capital Formation, Inc. · 1990
- Device for driving elevator at service interruption54US 5,285,029 AMitsubishi Denki Kabushiki Kaisha · 1994