Granted Patent
Utility
US 5,209,607 · App. 07/397,988
Powder feeder apparatus
Inventors:
Nan Wei, Philip M. Rose, Chi-Hung Lin, David R. Kreider, Ronald Stark
Patented Case
View Patent ↗
Granted: May 11, 1993
Filed: Aug 24, 1989
Inventors
Nan Wei
Philip M. Rose
Chi-Hung Lin
David R. Kreider
Ronald Stark
Assignee (at issue)
Amoco Corporation
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.