Granted Patent
Utility
US 4,845,792 · App. 07/186,950
Two-part adjustable approach ramp
Inventors:
Gerald R. Bakula, Donald J. Caldwell, Andrzej J. Dlugolecki
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Apr 27, 1988
Inventors
Gerald R. Bakula
Donald J. Caldwell
Andrzej J. Dlugolecki
Assignee (at issue)
Snap-on Tools 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.