Granted Patent
Utility
US 5,935,291 · App. 08/959,996
Bushings and fiber forming assemblies
Inventors:
Kwan-young KIM, James W. Koewing, Robert A. Roach
Patented Case
View Patent ↗
Granted: Aug 10, 1999
Filed: Oct 29, 1997
Inventors
Kwan-young KIM
James W. Koewing
Robert A. Roach
Assignee (at issue)
PPG Industries Ohio, 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.