Granted Patent
Utility
US 4,838,921 · App. 07/207,344
Plunger assembly for a glassware forming machine
Inventor:
Albert J. Trahan
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Jun 15, 1988
Inventor
Albert J. Trahan
Assignee (at issue)
Emhart Industries, 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.