H01F 29/06
Variable transformers or inductances not covered by group h01f21/00: with current collector
Official title: with current collector gliding or rolling on or along winding
H01F29/06 (Variable transformers or inductances not covered by group h01f21/00: with current collector) appears on 21 US grants and 3 published applications in this corpus.
Search patents in H01F- Granted patents
- 21
- Published applications
- 3
- Assignees
- 15
- Inventors
- 25
- Latest grant
- 27 Aug 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 2 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Adjustable inductor27 Aug 2019US 10,395,812 B1The United States of America as represented by the Secretary of the Navy
- Adjustable inductor16 Jan 2018US 9,870,853 B1The United States of America as represented by the Secretary of the Navy
- Methods of assembling and using an adjustable inductor16 Jan 2018US 9,870,854 B1The Government of the United States of America, as represented by the Secretary of the Navy
- Compliant motor driven variable electrical device4 Mar 2008US 7,339,298 B2Superior Electric Holding Group LLC.
- Variable transformer with slidable contactor1 Feb 1994US 5,283,728 A
- System and method for controlling a 3-phase transformer device15 Sep 2022US 2022/0294374 A1EM-Energy Solutions AS
- System for transmitting electrical energy23 Jun 2022US 2022/0199319 A1Folquer Holdings Limited
- Compliant motor driven variable electrical device15 Sep 2005US 2005/0200443 A1Superior Electric Holding Group LLC.
Most cited
By later US patents
- Current amplifying apparatus47US 4,431,960 AFDX Patents Holding Company, N.V. · 1984
- Tap changing voltage regulator which eliminates preventive autotransformer15US 4,130,789 AAllis-Chalmers Corporation · 1978
- Variable voltage direct current power supply and motor speed control13US 4,330,818 A1982
- Variable transformer with slidable contactor11US 5,283,728 A1994
- Electrical device with improved heat dissipation10US 4,496,923 AThe Superior Electric Company · 1985