Granted Patent
Utility
US 4,674,972 · App. 06/808,548
Apparatus for thermoforming plastic articles
Inventor:
Curtis D. Wagner
Patented Case
View Patent ↗
Granted: Jun 23, 1987
Filed: Dec 13, 1985
Inventor
Curtis D. Wagner
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.