H01R 39/04
Commutators
Official title: Commutators (wherein the segments are formed by extensions of dynamo-electric machine winding H02K)
H01R39/04 (Commutators) appears on 238 US grants and 125 published applications in this corpus.
Search patents in H01R- Granted patents
- 238
- Published applications
- 125
- Assignees
- 123
- Inventors
- 474
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 6 | 0 |
| 1984 | 7 | 0 |
| 1985 | 4 | 0 |
| 1986 | 6 | 0 |
| 1987 | 6 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 7 | 0 |
| 1993 | 5 | 0 |
| 1994 | 4 | 0 |
| 1995 | 6 | 0 |
| 1996 | 5 | 0 |
| 1997 | 6 | 0 |
| 1998 | 7 | 0 |
| 1999 | 14 | 0 |
| 2000 | 8 | 0 |
| 2001 | 11 | 7 |
| 2002 | 5 | 6 |
| 2003 | 9 | 7 |
| 2004 | 14 | 11 |
| 2005 | 6 | 6 |
| 2006 | 9 | 3 |
| 2007 | 3 | 9 |
| 2008 | 1 | 7 |
| 2009 | 2 | 5 |
| 2010 | 7 | 7 |
| 2011 | 0 | 4 |
| 2012 | 3 | 6 |
| 2013 | 3 | 4 |
| 2014 | 3 | 3 |
| 2015 | 6 | 5 |
| 2016 | 1 | 4 |
| 2017 | 1 | 5 |
| 2018 | 4 | 9 |
| 2019 | 10 | 4 |
| 2020 | 1 | 4 |
| 2021 | 4 | 2 |
| 2022 | 3 | 3 |
| 2023 | 3 | 1 |
| 2024 | 1 | 2 |
| 2025 | 3 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Motor manufacturing method and motor manufacturing system21 Oct 2025US 12,451,773 B2Hl Mando Corporation
- Electrode connection structure and detection device9 Sep 2025US 12,413,034 B2KELK Ltd.
- Rotating brushes for electric motors1 Apr 2025US 12,266,987 B1
- Electrical generation26 Mar 2024US 11,942,820 B2
- Fluid pump and brush spring retainer thereof14 Nov 2023US 11,817,758 B2Delphi Technologies IP Limited
- Rotating brushes for electric motors3 Apr 2025US 2025/0112529 A1
- Electrical Generation29 Feb 2024US 2024/0072624 A1
- Electrode connection structure and detection device25 Jan 2024US 2024/0030669 A1KELK Ltd.
- Novel arched commutator structure of brush direct current motor26 Jan 2023US 2023/0025635 A1Xi'an Si Special Transmission Manufacturing Co., Ltd.
- Motor manufacturing method and motor manufacturing system10 Nov 2022US 2022/0360148 A1Mando Corporation
Most cited
By later US patents
- Commutator type rotary electric machine50US 5,608,280 ANippondenso Co., Ltd. · 1997
- Flat commutator and method for its production45US 5,157,299 AKautt & Bux KG · 1992
- Brush holder arrangement of DC motor38US 6,326,716 B1Denso Corporation · 2001
- Molded commutator with a layer of insulation on the base36US 5,003,212 AASMO Co.LTD · 1991
- Electric manual machine tool driven by an electric motor36US 7,196,440 B2Robert Bosch GmbH · 2007