Vacuum pump with back-up bearing contact sensor
US-9822788-B2 · Nov 21, 2017 · US
magnetic; electromagnetic
magnetic; electromagnetic · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F04D29/058 |
| Official title | magnetic; electromagnetic |
| Display label | magnetic; electromagnetic |
| Total patents | 408 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 23 |
| 2016 | 30 |
| 2017 | 35 |
| 2018 | 44 |
| 2019 | 34 |
| 2020 | 57 |
| 2021 | 42 |
| 2022 | 44 |
| 2023 | 31 |
| 2024 | 36 |
| 2025 | 24 |
| 2026 | 8 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Centrifugal compressor diffuser control
US-9810228-B2 · Nov 7, 2017 · US
Magnetic levitation vacuum pump
US-2017268519-A1 · Sep 21, 2017 · US
Monitoring device
US-2017184113-A1 · Jun 29, 2017 · US
Refrigerant compressor magnetic bearing
US-9624939-B2 · Apr 18, 2017 · US
Fan assembly
US-2017051758-A1 · Feb 23, 2017 · US
Circulating dielectric oil cooling system for canned bearings and canned electronics
US-9551349-B2 · Jan 24, 2017 · US
Compressor and chiller system including a compressor
US-2016377086-A1 · Dec 29, 2016 · US
Sensorless magnetic levitation vacuum pump and sensorless magnetic levitation device
US-9506475-B2 · Nov 29, 2016 · US
Efficient and reliable subsea compression system
US-9488180-B2 · Nov 8, 2016 · US
Protective bearing, bearing unit, and vacuum pump
US-2016312826-A1 · Oct 27, 2016 · US
Compressor and motor vehicle
US-2016312690-A1 · Oct 27, 2016 · US
Method of dynamic balancing for magnetic levitation molecular pump
US-9479035-B2 · Oct 25, 2016 · US
Method of dynamic balancing for magnetic levitation molecular pump
US-9470236-B2 · Oct 18, 2016 · US
Motor-compressor with stage impellers integrated in the motor-rotors
US-2016290345-A1 · Oct 6, 2016 · US
Magnetic bearing device and vacuum pump
US-2016290351-A1 · Oct 6, 2016 · US
Impeller with offset splitter blades
US-2016281732-A1 · Sep 29, 2016 · US
Downhole Compressor
US-2016273324-A1 · Sep 22, 2016 · US
Expander-integrated compressor, refrigerator and operating method for refrigerator
US-2016265545-A1 · Sep 15, 2016 · US
Indoor device for an air conditioner
US-9435547-B2 · Sep 6, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D29/058?
- CPC F04D29/058 is the Cooperative Patent Classification code for “magnetic; electromagnetic.”
- How many patents are filed under CPC F04D29/058 (magnetic; electromagnetic)?
- Our database includes 408 publications tagged with this CPC code.
- Is patent activity under CPC F04D29/058 growing?
- Publication counts under this code: 36 in 2024 vs 24 in 2025 (latest complete years).