Granted Patent
Utility
US 4,792,426 · App. 07/119,302
Precision control of the thickness of heat-softenable material
Inventors:
Anthony T. Greatorex, Joseph S. Robbins, III, Ernest A. Toon, David A. Thompson
Patented Case
View Patent ↗
Granted: Dec 20, 1988
Filed: Nov 6, 1987
Inventors
Anthony T. Greatorex
Joseph S. Robbins, III
Ernest A. Toon
David A. Thompson
Assignee (at issue)
USM Holding AG
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.