Granted Patent
Utility
US 4,890,729 · App. 07/342,979
Lens retaining apparatus
Inventor:
Joseph V. Ranalletta
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Apr 25, 1989
Inventor
Joseph V. Ranalletta
Assignee (at issue)
RYDER INTERNATIONAL CO., LTD.
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.