Patent Assignment
Reel/Frame 049852/0690
Assignment of Assignor's Interest
Recorded: 2019-07-24
Pages: 5
Assignors
NAGANAWA, SHIGEMI
Executed: 2019-07-01
TUCHIYA, NORIYUSHI
Executed: 2019-06-26
SHIMADA, KUNIAKI
Executed: 2019-06-21
Assignees
THE UNIVERSITY OF TOKYO
3-1, HONGO 7-CHOME, BUNKYO-KU, TOKYO, 113-8654, JAPAN
TOHOKU UNIVERSITY
2-1-1, KATAHIRA, AOBA-KU, SENDAI-SHI, MIYAGI, 980-8577, JAPAN
TEISEKI DRILLING CO., LTD.
7F SHINJUKU TX BLDG., 32-1, OKUBO, 1 CHOME, SHINJUKU-KU, TOKYO, 169-0072, JAPAN
Covered Property
(1)
Well Drilling Bit and Well Drilling Method Using the Same
Related Assignments
(2)
Other recorded transfers of the patent in this record — the chain of ownership.
Corrective Assignment to Correct the Correct Name of an Inventor Previously Recorded at Reel: 049852 Frame: 0690. Assignor(S) Hereby Confirms the Assignment.
Sep 12, 2019
From: NAGANAWA, SHIGEMI; TUCHIYA, NORIYOSHI; SHIMADA, KUNIAKI
To: THE UNIVERSITY OF TOKYO; TOHOKU UNIVERSITY; TEISEKI DRILLING CO., LTD
Reel/Frame 050355/0484 →
Change of Name
Nov 2, 2021
From: TEISEKI DRILLING CO., LTD.
To: INPEX DRILLING CO., LTD.
Reel/Frame 058303/0425 →