H02K
Dynamo-electric machines
Official title: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
H02K (Dynamo-electric machines) appears on 59,373 US grants and 61,560 published applications in this corpus.
Search patents in H02K- Granted patents
- 59,373
- Published applications
- 61,560
- Assignees
- 11,839
- Inventors
- 82,664
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 372 | 0 |
| 1977 | 366 | 0 |
| 1978 | 408 | 0 |
| 1979 | 305 | 0 |
| 1980 | 372 | 0 |
| 1981 | 389 | 0 |
| 1982 | 444 | 0 |
| 1983 | 366 | 0 |
| 1984 | 440 | 0 |
| 1985 | 428 | 0 |
| 1986 | 446 | 0 |
| 1987 | 559 | 0 |
| 1988 | 489 | 0 |
| 1989 | 596 | 0 |
| 1990 | 487 | 0 |
| 1991 | 532 | 0 |
| 1992 | 514 | 0 |
| 1993 | 508 | 0 |
| 1994 | 513 | 0 |
| 1995 | 438 | 0 |
| 1996 | 487 | 0 |
| 1997 | 591 | 0 |
| 1998 | 920 | 0 |
| 1999 | 936 | 0 |
| 2000 | 900 | 0 |
| 2001 | 958 | 331 |
| 2002 | 962 | 1278 |
| 2003 | 953 | 1251 |
| 2004 | 1339 | 1539 |
| 2005 | 1125 | 1488 |
| 2006 | 1035 | 1539 |
| 2007 | 841 | 1584 |
| 2008 | 874 | 1651 |
| 2009 | 1027 | 1758 |
| 2010 | 1298 | 1980 |
| 2011 | 1364 | 2000 |
| 2012 | 1323 | 2052 |
| 2013 | 1529 | 2583 |
| 2014 | 1593 | 2640 |
| 2015 | 1640 | 2620 |
| 2016 | 1778 | 2729 |
| 2017 | 2197 | 3095 |
| 2018 | 2306 | 3094 |
| 2019 | 3010 | 3438 |
| 2020 | 3048 | 3631 |
| 2021 | 2757 | 3318 |
| 2022 | 2818 | 3586 |
| 2023 | 2714 | 3427 |
| 2024 | 3036 | 3584 |
| 2025 | 3040 | 2989 |
| 2026 | 2002 | 2375 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- H02K 7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines19,440
- H02K 1/00Details of the magnetic circuit15,385
- H02K 5/00Casings14,362
- H02K 11/00Structural association of dynamo-electric machines with electric components or with devices for10,753
- H02K 3/00Details of windings10,699
- H02K 15/00Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of8,899
- H02K 9/00Arrangements for cooling or ventilating6,971
- H02K 21/00Synchronous motors having permanent magnets6,802
All 39 main groupsShow fewer
- H02K 41/00Propulsion systems in which a rigid body is moved along a path4,925
- H02K 2213/00Specific aspects, not otherwise provided for and not covered by codes h02k2201/00Indexing code4,081
- H02K 29/00Motors or generators having non-mechanical commutating devices2,960
- H02K 2201/00Specific aspects not provided for in the other groups of this subclassIndexing code2,781
- H02K 33/00Motors with reciprocating, oscillating or vibrating magnet, armature or coil system2,505
- H02K 16/00Machines with more than one rotor or stator2,465
- H02K 2203/00Specific aspects not provided for in the other groups of this subclassIndexing code2,364
- H02K 19/00Synchronous motors or generators1,890
- H02K 2211/00Specific aspects not provided for in the other groups of this subclassIndexing code1,481
- H02K 23/00Dc commutator motors or generators having mechanical commutator1,382
- H02K 49/00Dynamo-electric clutches1,353
- H02K 17/00Asynchronous induction motors1,157
- H02K 37/00Motors with rotor rotating step by step and without interrupter or commutator1,009
- H02K 13/00Structural associations of current collectors with motors or generators943
- H02K 35/00Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other924
- H02K 2205/00Specific aspects not provided for in the other groups of this subclassIndexing code796
- H02K 55/00Dynamo-electric machines having windings operating at cryogenic temperatures662
- H02K 53/00Alleged dynamo-electric perpetua mobilia445
- H02K 44/00Machines in which the dynamo-electric interaction between a plasma or flow of433
- H02K 99/00Subject matter not provided for in other groups of this subclass378
- H02K 26/00Machines adapted to function as torque motors, i.e. to exert a torque328
- H02K 24/00Machines adapted for the instantaneous transmission or reception of the angular displacement260
- H02K 51/00Dynamo-electric gears, i.e. dynamo-electric means for transmitting mechanical power from a driving234
- H02K 47/00Dynamo-electric converters198
- H02K 31/00Acyclic motors or generators, i.e. dc machines having drum or disc armatures156
- H02K 2207/00Specific aspects not provided for in the other groups of this subclassIndexing code134
- H02K 39/00Generators specially adapted for producing a desired non-sinusoidal waveform81
- H02K 25/00Dc interrupter motors or generators80
- H02K 2209/00Specific aspects not provided for in the other groups of this subclassIndexing code77
- H02K 2215/00Specific aspects not provided for in other groups of this subclass relatingIndexing code66
- H02K 27/00Ac commutator motors or generators having mechanical commutator32
Recent patents
- Tool driver with reaction torque sensor for use in robotic surgery6 Oct 2026US 12,751,780 B2Auris Health, Inc.
- Electrically driven axle6 Oct 2026US 12,752,619 B2Meritor Electric Vehicles Germany GmbH
- Transportation system6 Oct 2026US 12,752,633 B2
- Steering gears with electric steering assist systems and related methods6 Oct 2026US 12,752,835 B2Ford Global Technologies, LLC
- Self-powered motorcycle and bicycle6 Oct 2026US 12,752,876 B2Amazing Sun Co., Ltd.
- Brush head assembly, transmission structure, and oral cleaning device8 Oct 2026US 2026/0306229 A1
- Implantable electromagnetic pumps8 Oct 2026US 2026/0306297 A1Verily Health Inc.
- Devices and systems for thermal management and ingress protection of medical devices8 Oct 2026US 2026/0306358 A1Zoll Circulation, Inc.
- Power tool with compact motor assembly8 Oct 2026US 2026/0307221 A1Black & Decker Inc.
- Motor Retention and Airflow Guide in a Power Tool8 Oct 2026US 2026/0307234 A1Black & Decker Inc.
Most cited
By later US patents
- Orthopedic surgical device2,191US 5,553,675 AMinnesota Mining and Manufacturing Company · 1996
- Powered surgical tool with control module that contains a sensor for remotely monitoring the tool power generating unit1,623US 7,638,958 B2Stryker Corporation · 2009
- Electronically commutated motor1,555US 4,169,990 AGeneral Electric Company · 1979
- Electric hand tool, in particular drill1,539US 5,533,581 ARobert Bosch GmbH · 1996
- Portable power tool1,521US 4,347,450 A1982