Granted Patent
Utility
US 4,306,475 · App. 06/105,835
Trim cleaning apparatus
Inventors:
Robert A. Stefanic, James I. Malin, Thomas Straub
Patented Case
View Patent ↗
Granted: Dec 22, 1981
Filed: Dec 20, 1979
Inventors
Robert A. Stefanic
James I. Malin
Thomas Straub
Assignee (at issue)
GAF Corporation
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.