Patent Assignment
Reel/Frame 050007/0435
Assignment of Assignor's Interest
Recorded: 2019-08-09
Pages: 3
Assignors
ZHANG, FEIFEI
Executed: 2019-07-09
WANG, YIDI
Executed: 2019-07-09
WANG, YUEZHI
Executed: 2019-07-09
WANG, XI
Executed: 2019-07-09
LI, SIYANG
Executed: 2019-07-09
Assignee
YANGTZE UNIVERSITY
NANHUAN ROAD 1, JINGZHOU, CHINA
Covered Property
(1)
Mud Circulation System for Reducing the Swab Pressure While Tripping Out