Granted Patent
Utility
US 4,217,977 · App. 05/942,608
Conveyor system
Inventor:
Johann Tam
Patented Case
View Patent ↗
Granted: Aug 19, 1980
Filed: Sep 15, 1978
Inventor
Johann Tam
Assignee (at issue)
Silicon Valley Group, 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.