H02K 3/487
Slot-closing devices
H02K3/487 (Slot-closing devices) appears on 441 US grants and 469 published applications in this corpus.
Search patents in H02K- Granted patents
- 441
- Published applications
- 469
- Assignees
- 193
- Inventors
- 1,204
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 6 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 6 | 0 |
| 2000 | 3 | 0 |
| 2001 | 15 | 6 |
| 2002 | 3 | 13 |
| 2003 | 6 | 12 |
| 2004 | 12 | 12 |
| 2005 | 8 | 13 |
| 2006 | 11 | 10 |
| 2007 | 8 | 7 |
| 2008 | 6 | 11 |
| 2009 | 6 | 13 |
| 2010 | 9 | 26 |
| 2011 | 15 | 11 |
| 2012 | 14 | 13 |
| 2013 | 11 | 7 |
| 2014 | 5 | 12 |
| 2015 | 8 | 18 |
| 2016 | 9 | 15 |
| 2017 | 16 | 16 |
| 2018 | 10 | 22 |
| 2019 | 18 | 30 |
| 2020 | 28 | 22 |
| 2021 | 12 | 34 |
| 2022 | 40 | 37 |
| 2023 | 23 | 24 |
| 2024 | 24 | 31 |
| 2025 | 15 | 31 |
| 2026 | 22 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Stator assembly15 Sep 2026US 12,738,789 B2Caterpillar Inc.
- Electrical machine having stator sleeve8 Sep 2026US 12,732,050 B2ROLLS-ROYCE plc
- Thermosetting resin composition and stator8 Sep 2026US 12,732,051 B2Sumitomo Bakelite Co., Ltd.
- Wedge for an electric motor1 Sep 2026US 12,726,070 B2GM Global Technology Operations LLC
- Segmented coil carrier with groove wedges made of multiple pieces18 Aug 2026US 12,712,402 B2Rolls-Royce Deutschland Ltd & Co KG
- Electric motor8 Oct 2026US 2026/0312440 A1Nanjing Chervon Industry Co., Ltd.
- Electric motor8 Oct 2026US 2026/0312441 A1Nanjing Chervon Industry Co., Ltd.
- Rotating electric machine1 Oct 2026US 2026/0302867 A1Honda Motor Co., Ltd.
- Slot Closure Device for an Electrical Machine, Method for Closing a Slot of an Electrical Machine, Electrical Machine, and Motor Vehicle17 Sep 2026US 2026/0280376 A1Bayerische Motoren Werke Aktiengesellschaft
- Winding transpositions and cross connections for generators and motors3 Sep 2026US 2026/0261167 A1
Most cited
By later US patents
- Alternator for an automotive vehicle130US 5,998,903 ADenso Corporation · 1999
- Method and apparatus for registering a known digital object to scanned 3-D model73US 7,471,821 B2OraMetrix, Inc. · 2008
- Resin impregnated aromatic polyamide covered glass based slot wedge for large dynamoelectric machines67US 4,200,818 AWestinghouse Electric Corp. · 1980
- Dynamoelectric machines including metal filled glass cloth slot closure wedges, and methods of making the same65US 5,124,607 AGeneral Electric Company · 1992
- Permanent-magnet revolving electrodynamic machine with a concentrated winding stator64US 6,335,582 B12002