LexDanaLexDanabeta
Inventor

Qiu Shi Zheng

Inventor
Spring, TX, US

Overview

4→
Patents
2003–2007
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 4 as inventor

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

E21Bprimary
E21BEarth or rock drilling40%
F16KValves40%
F16JPistons20%
PatentTitleYear
7,249,750'Pressure balanced fluid control device'20077,066,444'Pressure balanced fluid control device'20066,869,079'Stackable metallic seal and method of using same'20056,510,895'Energized sealing cartridge for annulus sealing between tubular well components'2003

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2003–2007Patents assigned to FMC TECHNOLOGIES (4)· patent assignee history
2003–2007Based in Spring, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
FMC TECHNOLOGIES42003–2007
Locations
LocationPatentsSpan
Spring, Texas, US42003–2007