Granted Patent
Utility
US 4,647,261 · App. 06/533,478
Cutting device and method for the precision trimming of the edge of a cast lens
Inventor:
Hans S. Schaffner
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Sep 19, 1983
Inventor
Hans S. Schaffner
Assignee (at issue)
International Hydron 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.