Patent Assignment
Reel/Frame 003974/0727
Assignment of Assignors Interest.
Recorded: 1981-12-04
Pages: 1
Assignor
MULLINS, JOHN M.
Executed: 1981-11-30
Assignee
HUGHES TOOL COMPANY, A CORP OF DE.
P.O. BOX 2539, HOUSTON, TEXAS, 77001
Covered Property
(1)
Rock Bit with Improved Shirttail Ventilation
Patent:
4,421,184 →
Application:
06/327,525 →
Related Assignments
(2)
Other recorded transfers of the patent in this record — the chain of ownership.