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Inventor

Changqing Du

Inventor
Troy, MI, US

Overview

7→
Patents
2015–2020
Patent span
Performing operations
Primary field (CPC B)

Patents· 7 as inventor

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

B21Dprimary
B21DWorking or processing of sheet metal or metal tubes, rods or profiles without essentially removing material78%
B23DPlaning11%
Y10TTechnical subjects covered by former us classification11%
PatentTitleYear
10,786,842Draw-in control for sheet drawing202010,668,516Post-compression for springback reduction202010,328,504Two-stage method of cutting ultra-high strength material sheet20199,914,164'Machine press'20189,827,606Stamping apparatus having flared bead20179,149,854'Stamping apparatus'20159,120,137'Stamping apparatus and method of use'2015

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2015–2020Patents assigned to DU CHANGQING (7)· patent assignee history
2015–2020Patents assigned to FCA US LLC (7)· patent assignee history
2015–2020Patents assigned to ZHOU DAJUN (7)· patent assignee history
2015–2018Patents assigned to SIEKIRK III JOHN F (2)· patent assignee history
2015–2020Based in Troy, MI, US· patent location history
2018–2020Patents assigned to MILLER ROBERT D (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DU CHANGQINGself72015–2020
FCA US LLC72015–2020
ZHOU DAJUN72015–2020
MILLER ROBERT D32018–2020
SIEKIRK III JOHN F22015–2018
Locations
LocationPatentsSpan
Troy, MI, US72015–2020