Inventor
Zhisheng Tian
Inventor
Shandong, CN
Overview
Patents· 1 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling33%
F04BPositive-displacement machines for liquids33%
Y10TTechnical subjects covered by former us classification33%
PatentTitleYear
8,047,821'Ring rack oil pumping machine'2011Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2011Patents assigned to SINOPEC GROUP SHENGLI PETROLEUM ADMINISTRATION TRANSP CORP (1)· patent assignee history
2011Based in Shandong, CN· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SINOPEC GROUP SHENGLI PETROLEUM ADMINISTRATION TRANSP CORP | 1 | 2011 |
Locations
| Location | Patents | Span |
|---|---|---|
| Shandong, CN | 1 | 2011 |