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Inventor

Kao SI

Inventor
CN

Overview

1→
Patents
2022
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 1 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

E21Bprimary
E21BEarth or rock drilling33%
F16JPistons33%
F16NLubricating33%
PatentTitleYear
11,261,687Wellhead sealing device of sucker-rod pumping machine2022

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2022Patents assigned to SI KAO (1)· patent assignee history
2022Patents assigned to YU LICHENG (1)· patent assignee history
2022Based in CN· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SI KAOself12022
YU LICHENG12022
Locations
LocationPatentsSpan
CN12022