Granted Patent
Utility
US 5,140,837 · App. 07/706,318
Process for rolling soft metals
Inventors:
John E. Thomas, Chung-sub Ryu, In Hyuck RYU, Gordon K. Young, Joong Ho SHIN
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: May 28, 1991
Inventors
John E. Thomas
Chung-sub Ryu
In Hyuck RYU
Gordon K. Young
Joong Ho SHIN
Assignees (at issue)
Tippins Incorporated
PMX Industries Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.