Granted Patent
Utility
US 6,045,431 · App. 08/996,935
Manufacture of thin-film magnetic heads
Inventors:
Sergei Cheprasov, Gordon J. Grosslight
Patented Case
View Patent ↗
Granted: Apr 4, 2000
Filed: Dec 23, 1997
Inventors
Sergei Cheprasov
Gordon J. Grosslight
Assignee (at issue)
SPEEDFAM CO., LTD.
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.