Inventor
Yafei Liu
Inventor
Shanghai, CN
Overview
Patents· 6 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
LOC14primary
LOC1427%
G01NInvestigating or analysing materials by determining their chemical or physical properties18%
E01FAdditional work, such as equipping roads or the construction of platforms, helicopter landing stages, signs, snow fences, or the like9%
E02DFoundations9%
E21BEarth or rock drilling9%
G01BMeasuring length, thickness or similar linear dimensions9%
G01FMeasuring volume, volume flow, mass flow or liquid level9%
G01LMeasuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure9%
PatentTitleYear
D0900866Display screen of a wearable device with transitional graphical user interface202010,732,086Device and method for measuring magnitude of seepage force and its influence on effective stress of formation2020D0858563Display screen of a wearable device with a transitional graphical user interface2019D0858561Display screen of a wearable device with a transitional graphical user interface20199,689,121'Piston-type variable speed control device'20179,453,829'Soil property test device'2016Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2016Based in Shijiazhuang, CN· patent location history
2017Patents assigned to GUAN JIZHEN (1)· patent assignee history
2017Patents assigned to LIU YAFEI (1)· patent assignee history
2017Patents assigned to SHI JIANJUN (1)· patent assignee history
2017Based in Beijing, CN· patent location history
2019–2020Patents assigned to SHANGHAI YUSHANZHI INFORMATION TECH COMPANY LIMITED (2)· patent assignee history
2019Patents assigned to MOBVOI INFORMATION TECH COMPANY LIMITED (1)· patent assignee history
2019–2020Based in Shanghai, CN· patent location history
2020Based in Shaanxi, CN· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SHANGHAI YUSHANZHI INFORMATION TECH COMPANY LIMITED | 2 | 2019–2020 |
| GUAN JIZHEN | 1 | 2017 |
| LIU YAFEIself | 1 | 2017 |
| MOBVOI INFORMATION TECH COMPANY LIMITED | 1 | 2019 |
| SHI JIANJUN | 1 | 2017 |
Locations
| Location | Patents | Span |
|---|---|---|
| Shanghai, CN | 3 | 2019–2020 |
| Shaanxi, CN | 1 | 2020 |
| Beijing, CN | 1 | 2017 |
| Shijiazhuang, CN | 1 | 2016 |