Main circuit part of vacuum circuit breaker with self-powered temperature sensor assembly
US-9766137-B2 · Sep 19, 2017 · US
Vacuum switches
Vacuum switches · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01H33/66 |
| Official title | Vacuum switches |
| Display label | Vacuum switches |
| Total patents | 211 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 30 |
| 2016 | 22 |
| 2017 | 23 |
| 2018 | 21 |
| 2019 | 19 |
| 2020 | 22 |
| 2021 | 11 |
| 2022 | 24 |
| 2023 | 19 |
| 2024 | 11 |
| 2025 | 7 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Mechanical wear, wipe and stroke measurement system for circuit breakers
US-9704657-B2 · Jul 11, 2017 · US
Interlock apparatus of vacuum circuit breaker
US-9679722-B2 · Jun 13, 2017 · US
Electrical switching device having parallel switching paths
US-2017162344-A1 · Jun 8, 2017 · US
Avoiding incorrect orientations of a drive rod of a power switch
US-2017133181-A1 · May 11, 2017 · US
Commutating circuit
US-2017126144-A1 · May 4, 2017 · US
Complex electrically operated ground and test device using vacuum circuit interrupters and methods of operating the same
US-9634469-B2 · Apr 25, 2017 · US
Electrical switching apparatus including an adjustable damper assembly
US-9595404-B2 · Mar 14, 2017 · US
Circuit breaker with low-clearance connections
US-9530595-B2 · Dec 27, 2016 · US
High-temperature, high-pressure vacuum relay
US-9524840-B2 · Dec 20, 2016 · US
Fast switch
US-9478383-B2 · Oct 25, 2016 · US
Vacuum interrupter
US-9478376-B2 · Oct 25, 2016 · US
Vacuum circuit breaker
US-2016308335-A1 · Oct 20, 2016 · US
Circuit-breaker pole part with a heat transfer shield
US-9431198-B2 · Aug 30, 2016 · US
Vacuum circuit breaker under high pressure
US-2016240338-A1 · Aug 18, 2016 · US
Complex electrically operated ground and test device using vacuum circuit interrupters and methods of operating the same
US-2016241003-A1 · Aug 18, 2016 · US
Multiphase medium voltage vacuum contactor
US-9418810-B2 · Aug 16, 2016 · US
Terminal structure of main circuit part of vacuum circuit breaker
US-9418805-B2 · Aug 16, 2016 · US
Single-phase-to-earth fault processing device and method for neutral non-effectively grounded distribution network
US-2016233661-A1 · Aug 11, 2016 · US
Mechanical Wear, Wipe and Stroke Measurement System for Circuit Breakers
US-2016225543-A1 · Aug 4, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01H33/66?
- CPC H01H33/66 is the Cooperative Patent Classification code for “Vacuum switches.”
- How many patents are filed under CPC H01H33/66 (Vacuum switches)?
- Our database includes 211 publications tagged with this CPC code.
- Is patent activity under CPC H01H33/66 growing?
- Publication counts under this code: 11 in 2024 vs 7 in 2025 (latest complete years).