Granted Patent
Utility
US 4,515,313 · App. 06/452,884
Air knife apparatus
Inventor:
Kenneth M. Cavanagh
Patented Case
View Patent ↗
Granted: May 7, 1985
Filed: Dec 27, 1982
Inventor
Kenneth M. Cavanagh
Assignee (at issue)
Marshall and Williams Company
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.