Granted Patent
Utility
US 4,889,549 · App. 07/337,510
Plunger operating mechanism for a glass forming machine
Inventors:
Albert J. Trahan, Robert J. Douglas
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Apr 13, 1989
Inventors
Albert J. Trahan
Robert J. Douglas
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.