Granted Patent
Utility
US 4,045,269 · App. 05/643,247
Transparent formable polyurethane polycarbonate lamination
Inventors:
David L. Voss, William A. Miller, Ralph D. Hermansen
Patented Case
View Patent ↗
Granted: Aug 30, 1977
Filed: Dec 22, 1975
Inventors
David L. Voss
William A. Miller
Ralph D. Hermansen
Assignee (at issue)
Sierracin Corporation
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.