H02K 7/1807
Rotary generators
Official title: {Rotary generators (H02K7/006 takes precedence)}
H02K7/1807 (Rotary generators) appears on 4,436 US grants and 5,641 published applications in this corpus.
Search patents in H02K- Granted patents
- 4,436
- Published applications
- 5,641
- Assignees
- 1,791
- Inventors
- 8,555
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 9 | 0 |
| 1978 | 7 | 0 |
| 1979 | 5 | 0 |
| 1980 | 10 | 0 |
| 1981 | 16 | 0 |
| 1982 | 6 | 0 |
| 1983 | 7 | 0 |
| 1984 | 8 | 0 |
| 1985 | 7 | 0 |
| 1986 | 7 | 0 |
| 1987 | 10 | 0 |
| 1988 | 11 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 2 | 0 |
| 1992 | 7 | 0 |
| 1993 | 5 | 0 |
| 1994 | 9 | 0 |
| 1995 | 5 | 0 |
| 1996 | 11 | 0 |
| 1997 | 8 | 0 |
| 1998 | 17 | 0 |
| 1999 | 20 | 0 |
| 2000 | 23 | 0 |
| 2001 | 32 | 11 |
| 2002 | 25 | 37 |
| 2003 | 35 | 55 |
| 2004 | 72 | 83 |
| 2005 | 54 | 70 |
| 2006 | 56 | 73 |
| 2007 | 36 | 84 |
| 2008 | 48 | 126 |
| 2009 | 43 | 123 |
| 2010 | 87 | 186 |
| 2011 | 98 | 204 |
| 2012 | 107 | 197 |
| 2013 | 158 | 234 |
| 2014 | 159 | 273 |
| 2015 | 177 | 272 |
| 2016 | 198 | 332 |
| 2017 | 271 | 428 |
| 2018 | 272 | 394 |
| 2019 | 348 | 378 |
| 2020 | 333 | 333 |
| 2021 | 325 | 318 |
| 2022 | 245 | 343 |
| 2023 | 280 | 321 |
| 2024 | 310 | 338 |
| 2025 | 293 | 253 |
| 2026 | 146 | 175 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Self-powered motorcycle and bicycle6 Oct 2026US 12,752,876 B2Amazing Sun Co., Ltd.
- Gas turbine engine with electric machine in engine core6 Oct 2026US 12,753,721 B2Pratt & Whitney Canada Corp.
- Submersible hydroelectric generator apparatus and method of operating same6 Oct 2026US 12,753,735 B2Static Hydro Energy (S.H.E.) Limited
- Cooling circuit for an electric generator6 Oct 2026US 12,753,741 B2Siemens Gamesa Renewable Energy A/S
- Dual oil pump with centrifugal shifter6 Oct 2026US 12,753,804 B1Schaeffler Technologies AG & Co. KG
- Electric machine comprising a clutch assembly8 Oct 2026US 2026/0309086 A1Unison Industries, LLC
- Methods of generating electric power and a distributed network of a generator-turbine apparatus having a set of electric generators simultaneously driven by a gravity-force applied and moment imbalanced turbine8 Oct 2026US 2026/0309131 A1
- Improvements relating to cooling of electric machines8 Oct 2026US 2026/0312450 A1Vestas Wind Systems A/S
- Triple Stator Homopolar Alternator8 Oct 2026US 2026/0312453 A1C. E. Niehoff & Co.
- A generator for use in a wind turbine8 Oct 2026US 2026/0312460 A1Vestas Wind Systems A/S
Most cited
By later US patents
- Electric machine having an integrally continuous stator winding and stator slot bridges1,193US 6,936,948 B2Pratt & Whitney Canada Corp. · 2005
- Mobile electric power generation for hydraulic fracturing of subsurface geological formations496US 9,534,473 B2Evolution Well Services, LLC · 2017
- Energy conversion systems and methods405US 10,060,473 B2Oceana Energy Company · 2018
- Mobile, modular, electrically powered system for use in fracturing underground formations358US 9,103,193 B2Evolution Well Services, LLC · 2015
- System and method for powering a hydraulic pump357US 8,997,904 B2General Electric Company · 2015