Granted Patent
Utility
US 4,871,111 · App. 07/183,971
Tapered tray with pre-glued elevating legs
Inventor:
Duane R. Mode
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: Apr 20, 1988
Inventor
Duane R. Mode
Assignee (at issue)
Waldorf 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.