Granted Patent
Utility
US 4,389,725 · App. 06/287,382
Electric boosting control for a glass forehearth
Inventors:
Marvin L. Barkhau, Philip D. Perry, Roland F. Pimm
Patented Case
View Patent ↗
Granted: Jun 21, 1983
Filed: Jul 27, 1981
Inventors
Marvin L. Barkhau
Philip D. Perry
Roland F. Pimm
Assignee (at issue)
Owens-Illinois 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.