Granted Patent
Utility
US 4,328,021 · App. 06/211,168
Threshold cart for flat glass forming apparatus and method of use
Inventors:
George O. Wehner, Stephen J. Schultz, Ronald R. Zito
Patented Case
View Patent ↗
Granted: May 4, 1982
Filed: Nov 28, 1980
Inventors
George O. Wehner
Stephen J. Schultz
Ronald R. Zito
Assignee (at issue)
PPG 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.