G01R 31/56
Testing of electric apparatus
Official title: Testing of electric apparatus (testing of transformers G01R31/62; testing of connections G01R31/66)
G01R31/56 (Testing of electric apparatus) appears on 84 US grants and 117 published applications in this corpus.
Search patents in G01R- Granted patents
- 84
- Published applications
- 117
- Assignees
- 110
- Inventors
- 346
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 4 |
| 2020 | 4 | 18 |
| 2021 | 5 | 17 |
| 2022 | 19 | 19 |
| 2023 | 14 | 12 |
| 2024 | 20 | 17 |
| 2025 | 13 | 14 |
| 2026 | 9 | 15 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Circuit with switch for discharging capacitive elements connected to a safety-related digital input25 Aug 2026US 12,716,936 B2WAGO Verwaltungsgesellschaft mbH
- Inspecting apparatus and semiconductor manufacturing equipment including the same18 Aug 2026US 12,710,459 B2Semes Co., Ltd.
- Auxiliary multipolar device for testing electrical instruments4 Aug 2026US 12,699,151 B2
- Enhanced switchgear monitoring and diagnostics in a protection relay19 May 2026US 12,633,479 B2GE Vernova Infrastructure Technology LLC
- Failure indication system31 Mar 2026US 12,588,650 B2Farrpro, Inc.
- Fault Determination Apparatus and Method for Three-Phase Dual Active Bridge Converter, And Electronic Device1 Oct 2026US 2026/0299048 A1Xi'an Jiaotong-Liverpool University
- Failure indication system17 Sep 2026US 2026/0271874 A1Farrpro, Inc.
- Electronic apparatus, print head, and method for manufacturing electronic apparatus10 Sep 2026US 2026/0266893 A1Seiko Epson Corporation
- Inspection device and inspection method27 Aug 2026US 2026/0251729 A1Denso Corporation
- Power Supply Device6 Aug 2026US 2026/0227461 A1Mitsubishi Electric Corporation
Most cited
By later US patents
- Method and apparatus to diagnose a linear synchronous motor system5US 10,562,715 B2MagneMotion, Inc. · 2020
- Signal generators for use with tissue modification systems4US 11,638,819 B2Galvanize Therapeutics, Inc. · 2023
- Systems and methods for managing smart alarms3US 11,668,764 B2Schneider Electric USA, Inc. · 2023
- Fault detection in hybrid DC-DC power convertors2US 11,293,992 B2NXP B. V. · 2022
- Diagnostic apparatus2US 11,293,997 B2Panasonic Intellectual Property Management Co., Ltd. · 2022