Granted Patent
Utility
US 5,320,657 · App. 08/056,117
Staggered short pleat air filter
Inventor:
Michael David Adams
Patented Case
View Patent ↗
Granted: Jun 14, 1994
Filed: Apr 30, 1993
Inventor
Michael David Adams
Assignee (at issue)
DANA LIMITED
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.