Granted Patent
Utility
US 5,774,056 · App. 08/655,396
Gauge for monitoring air filters
Inventors:
Charles Henry Berry, III, Jerry Lee Manross, Thomas Alan Stoll, Gregory Matthew Ferris, James Nathan Forry
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: May 30, 1996
Inventors
Charles Henry Berry, III
Jerry Lee Manross
Thomas Alan Stoll
Gregory Matthew Ferris
James Nathan Forry
Assignee (at issue)
Engineered Products 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.