Granted Patent
Utility
US 4,524,716 · App. 06/571,808
Adjustable air knife
Inventor:
Hans Mueller
Patented Case
View Patent ↗
Granted: Jun 25, 1985
Filed: Jan 18, 1984
Inventor
Hans Mueller
Assignee (at issue)
Appleton Papers 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.