H01F 21/04
By relative movement of turns or parts of windings
Official title: by relative movement of turns or parts of windings
H01F21/04 (By relative movement of turns or parts of windings) appears on 71 US grants and 69 published applications in this corpus.
Search patents in H01F- Granted patents
- 71
- Published applications
- 69
- Assignees
- 66
- Inventors
- 124
- Latest grant
- 4 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 5 |
| 2005 | 2 | 1 |
| 2006 | 4 | 9 |
| 2007 | 5 | 8 |
| 2008 | 3 | 2 |
| 2009 | 3 | 3 |
| 2010 | 3 | 4 |
| 2011 | 5 | 1 |
| 2012 | 1 | 0 |
| 2013 | 2 | 2 |
| 2014 | 1 | 6 |
| 2015 | 3 | 2 |
| 2016 | 5 | 3 |
| 2017 | 3 | 6 |
| 2018 | 0 | 0 |
| 2019 | 5 | 3 |
| 2020 | 2 | 3 |
| 2021 | 1 | 1 |
| 2022 | 2 | 1 |
| 2023 | 3 | 3 |
| 2024 | 3 | 2 |
| 2025 | 1 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Rotary variable differential transformer4 Feb 2025US 12,217,894 B2Honeywell International Inc.
- Adjustable inductor and method of using the same10 Sep 2024US 12,087,485 B2Hubbell Incorporated
- Rotor for a hover-capable aircraft18 Jun 2024US 12,012,204 B2Leonardo S.P.A.
- Power converter28 May 2024US 11,996,783 B2Denso Corporation
- Adjustable inductor and method of using the same7 Nov 2023US 11,810,705 B2Hubbell Incorporated
- Rotary variable differential transformer8 May 2025US 2025/0149227 A1Honeywell International Inc.
- Variable inductor and inductor module13 Mar 2025US 2025/0087401 A1DB HiTek Co., Ltd.
- Charging apparatus14 Nov 2024US 2024/0380255 A1Vivo Mobile Communication Co., Ltd.
- Adjustable inductor and method of using the same25 Jan 2024US 2024/0029933 A1Hubbell Incorporated
- Rotary variable differential transformer12 Oct 2023US 2023/0326647 A1Honeywell International Inc.
Most cited
By later US patents
- Microwave tunable inductor and associated methods55US 7,148,783 B2Harris Corporation · 2006
- Steering wheel and car using the steering wheel44US 9,509,170 B2Hon Hai Precision Industry Co., Ltd. · 2016
- Linear variable differential transformers for high precision position measurements29US 7,038,443 B2Asylum Research Corporation · 2006
- Integrateable capacitors and microcoils and methods of making thereof28US 7,517,769 B2Palo Alto Research Center Incorporated · 2009
- Precision transducer for position measurements27US 4,150,352 AIng. C. Olivetti & C., S.p.A. · 1979