Inventor
Qingfeng Liu
Inventor
Shenzhen, CN
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H02Mprimary
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems11%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications11%
C25DProcesses for the electrolytic or electrophoretic production of coatings7%
G06FElectric digital data processing7%
G10LSpeech analysis techniques or speech synthesis7%
H05KPrinted circuits7%
B24BMachines, devices, or processes for grinding or polishing4%
C23CCoating metallic material4%
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light4%
G06KGraphical data reading4%
PatentTitleYear
10,813,226Process for improving performance of sliding rheostat of 5G communication high-frequency signal board202010,355,601Switched-mode power supplies having burst mode operation for reduced power consumption201910,340,787Power factor correction stage control during start-up for efficient use of a negative temperature coefficient thermistor201910,339,428Intelligent scoring method and system for text objective question201910,224,499Biomolecule-carbon nanostructure nanocomposites for optoelectronic devices201910,212,824Gold-plating etching process for 5G communication high-frequency signal boards20199,991,799Switch mode power supplies including primary side clamping circuits controlled based on secondary side signals20189,564,127'Speech recognition method and system based on user personalized information'20179,330,667'Method and system for endpoint automatic detection of audio record'2016Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2016–2019Patents assigned to IFLYTEK CO LTD (3)· patent assignee history
2016Patents assigned to HU GUOPING (1)· patent assignee history
2016Patents assigned to HU YU (1)· patent assignee history
2016–2019Based in Anhui, CN· patent location history
2017Based in Hefei, CN· patent location history
2018–2019Patents assigned to ASTEC INT LTD (3)· patent assignee history
2018–2019Based in Shenzhen, CN· patent location history
2019–2020Patents assigned to KUNSHAN TVS ELECTRONIC TECH CO LTD (2)· patent assignee history
2019–2020Based in Kunshan, CN· patent location history
2019Based in Lawrence, KS, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| ASTEC INT LTD | 3 | 2018–2019 |
| IFLYTEK CO LTD | 3 | 2016–2019 |
| KUNSHAN TVS ELECTRONIC TECH CO LTD | 2 | 2019–2020 |
| HU GUOPING | 1 | 2016 |
| HU YU | 1 | 2016 |
Locations
| Location | Patents | Span |
|---|---|---|
| Shenzhen, CN | 3 | 2018–2019 |
| Kunshan, CN | 2 | 2019–2020 |
| Anhui, CN | 2 | 2016–2019 |
| Lawrence, KS, US | 1 | 2019 |
| Hefei, CN | 1 | 2017 |