H01H 50/002
Particular to three-phase electromagnetic relays
Official title: {particular to three-phase electromagnetic relays (synchronous switching H01H9/563)}
H01H50/002 (Particular to three-phase electromagnetic relays) appears on 63 US grants and 60 published applications in this corpus.
Search patents in H01H- Granted patents
- 63
- Published applications
- 60
- Assignees
- 27
- Inventors
- 100
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 2 | 3 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 2 |
| 2009 | 1 | 1 |
| 2010 | 1 | 1 |
| 2011 | 1 | 1 |
| 2012 | 2 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 3 |
| 2015 | 2 | 4 |
| 2016 | 3 | 12 |
| 2017 | 9 | 3 |
| 2018 | 4 | 3 |
| 2019 | 6 | 1 |
| 2020 | 4 | 4 |
| 2021 | 1 | 8 |
| 2022 | 7 | 4 |
| 2023 | 5 | 3 |
| 2024 | 1 | 1 |
| 2025 | 2 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Multi-phase electromagnetic relay18 Aug 2026US 12,712,140 B2Xiamen Hongfa Electric Power Controls Co., Ltd.
- Electromagnetic contactor for star-delta driving15 Apr 2025US 12,278,069 B2
- Protection unit for control/command units of an electrical enclosure7 Jan 2025US 12,191,104 B2Schneider Electric Industries SAS
- Systems and methods for controlling firing delay in multi-phase relay devices10 Sep 2024US 12,087,529 B2Rockwell Automation Technologies, Inc.
- Universal control module for a reversing contactor3 Oct 2023US 11,778,759 B2Rockwell Automation Technologies, Inc.
- Switch10 Sep 2026US 2026/0269149 A1Mitsubishi Electric Corporation
- Systems and methods for automatically configuring point-on-wave settings in a relay device23 Jan 2025US 2025/0029801 A1Rockwell Automation Technologies, Inc.
- Multi-phase electromagnetic relay22 Aug 2024US 2024/0282539 A1Xiamen Hongfa Electric Power Controls Co., Ltd.
- Electromagnetic contactor for star-delta driving10 Aug 2023US 2023/0253171 A1
- Protection unit for control/command units of an electrical enclosure22 Jun 2023US 2023/0197369 A1Schneider Electric Industries SAS
Most cited
By later US patents
- Method and apparatus to control modular asynchronous contactors44US 6,943,654 B2Eaton Corporation · 2005
- Method and system of controlling asynchronous contactors for a multi-phase electric load35US 7,224,557 B2Eaton Corporation · 2007
- Single-pole, single current path switching system and method34US 9,726,726 B2Rockwell Automation Technologies, Inc. · 2017
- Single pole, single current path switching system and method31US 10,361,051 B2Rockwell Automation Technologies, Inc. · 2019
- Three-phase switchgear22US 4,471,183 ASiemens Aktiengesellschaft · 1984