System and method for optimizing wind turbine operation
US-9828971-B2 · Nov 28, 2017 · US
having provision for tap-changing without interrupting the load current
having provision for tap-changing without interrupting the load current · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01F29/04 |
| Official title | having provision for tap-changing without interrupting the load current |
| Display label | having provision for tap-changing without interrupting the load current |
| Total patents | 140 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 21 |
| 2016 | 24 |
| 2017 | 15 |
| 2018 | 9 |
| 2019 | 11 |
| 2020 | 12 |
| 2021 | 12 |
| 2022 | 9 |
| 2023 | 10 |
| 2024 | 10 |
| 2025 | 6 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Oil Type Phase Shift Transformer for Medium Voltage Inverter System
US-2017288572-A1 · Oct 5, 2017 · US
Switching arrangement for a control transformer, in particular polarity switching means
US-2017271098-A1 · Sep 21, 2017 · US
On-load tap changer
US-9762161-B2 · Sep 12, 2017 · US
Preselector switch assembly for a variable transformer
US-2017236658-A1 · Aug 17, 2017 · US
Switching circuit with two load tap changers, electrical assembly with such a switching circuit, and use thereof
US-2017154738-A1 · Jun 1, 2017 · US
Voltage control system
US-9618950-B2 · Apr 11, 2017 · US
Tap changer and vacuum interrupter for a tap changer of this kind
US-9607781-B2 · Mar 28, 2017 · US
Method of manufacturing an electromagnetic induction device and an electromagnetic induction device
US-9601260-B2 · Mar 21, 2017 · US
System and method for regulation of voltage on an electrical network
US-9600004-B2 · Mar 21, 2017 · US
Method of operating on-load tap changer
US-9588527-B2 · Mar 7, 2017 · US
Tap-changer switching system and method of operating same
US-2017062146-A1 · Mar 2, 2017 · US
System and method for operating an on-load tap changer
US-9570252-B2 · Feb 14, 2017 · US
Load tap changer
US-9557754-B2 · Jan 31, 2017 · US
On-load tap changer
US-9543096-B2 · Jan 10, 2017 · US
Method for performing a switching process in an on-load tap changer
US-9513654-B2 · Dec 6, 2016 · US
Switch
US-2016351356-A1 · Dec 1, 2016 · US
On-load tap changer according to the reactor switching principle
US-2016329168-A1 · Nov 10, 2016 · US
Electrical switching system for a three-phase network
US-2016293325-A1 · Oct 6, 2016 · US
Double dead band tab switch for transformer and control method
US-2016254106-A1 · Sep 1, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01F29/04?
- CPC H01F29/04 is the Cooperative Patent Classification code for “having provision for tap-changing without interrupting the load current.”
- How many patents are filed under CPC H01F29/04 (having provision for tap-changing without interrupting the load current)?
- Our database includes 140 publications tagged with this CPC code.
- Is patent activity under CPC H01F29/04 growing?
- Publication counts under this code: 10 in 2024 vs 6 in 2025 (latest complete years).