G05F 1/14
Using tap transformers or tap changing inductors as final control devices
Official title: using tap transformers or tap changing inductors as final control devices
G05F1/14 (Using tap transformers or tap changing inductors as final control devices) appears on 224 US grants and 157 published applications in this corpus.
Search patents in G05F- Granted patents
- 224
- Published applications
- 157
- Assignees
- 126
- Inventors
- 417
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 6 | 0 |
| 1978 | 2 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 5 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 8 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 8 | 0 |
| 1997 | 9 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 7 | 0 |
| 2001 | 3 | 1 |
| 2002 | 6 | 2 |
| 2003 | 0 | 2 |
| 2004 | 1 | 5 |
| 2005 | 3 | 6 |
| 2006 | 4 | 3 |
| 2007 | 0 | 5 |
| 2008 | 8 | 2 |
| 2009 | 2 | 6 |
| 2010 | 5 | 7 |
| 2011 | 5 | 5 |
| 2012 | 3 | 4 |
| 2013 | 7 | 7 |
| 2014 | 2 | 4 |
| 2015 | 7 | 14 |
| 2016 | 10 | 13 |
| 2017 | 13 | 5 |
| 2018 | 4 | 8 |
| 2019 | 10 | 14 |
| 2020 | 11 | 13 |
| 2021 | 7 | 5 |
| 2022 | 6 | 8 |
| 2023 | 10 | 5 |
| 2024 | 5 | 1 |
| 2025 | 3 | 9 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and apparatus for identifying proper regulation method based on average voltage change between tap steps for voltage regulators11 Aug 2026US 12,704,865 B2Hubbell Incorporated
- Voltage regulator control in electric power systems with distributed generation31 Mar 2026US 12,592,582 B2Schweitzer Engineering Laboratories, Inc.
- Impedance control transformer assembly5 Aug 2025US 12,381,396 B1Pacific Transformer Corporation
- Wind turbine transformer control1 Jul 2025US 12,346,140 B2Siemens Gamesa Renewable Energy Innovation & Technology S.L.
- Gas shut-off in a particulate removal device and method7 Jan 2025US 12,189,406 B2Dürr Systems AG
- Dynamic power flow controller (dpfc) for regulating power flow in a power transmission line25 Jun 2026US 2026/0178063 A1
- Iot-based automated voltage controller system for motor operated three-phase autotransformer26 Feb 2026US 2026/0056564 A1
- Isolation transformer with autovoltage regulation29 Jan 2026US 2026/0031271 A1
- Voltage Regulator Control in Electric Power Systems with Distributed Generation4 Dec 2025US 2025/0373071 A1Schweitzer Engineering Laboratories, Inc.
- Method for adapting a target voltage value for controlling a tap-changing transformer, and device for adapting a target voltage value for controlling a tap-changing transformer13 Nov 2025US 2025/0350220 A1Maschinenfabrik Reinhausen GmbH
Most cited
By later US patents
- Uninterruptible power system402US 5,602,462 ABest Power Technology, Inc. · 1997
- Method and apparatus for automatic voltage reduction control186US 4,346,341 AGeneral Electric Company · 1982
- Microcontroller-based tap changer controller employing half-wave digitization of A.C. signals136US 5,581,173 ABeckwith Electric Co., Inc. · 1996
- Transformer tap switching power supply for LED traffic signal79US 6,078,148 ARelume Corporation · 2000
- Switched multi-tapped transformer power conversion method and apparatus62US 5,155,672 AHeart Interface Corporation · 1992