Granted Patent
Utility
US 5,728,191 · App. 08/785,278
Plunger for gob feeder
Inventor:
Hiroki Yamazaki
Patented Case
View Patent ↗
Granted: Mar 17, 1998
Filed: Jan 21, 1997
Inventor
Hiroki Yamazaki
Assignee (at issue)
ASAHI GLASS 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.