Granted Patent
Utility
US 4,660,972 · App. 06/710,832
Arrangement for visualizing the cores of optical waveguides
Inventors:
Rolf Rossberg, Peter Schmid
Patented Case
View Patent ↗
Granted: Apr 28, 1987
Filed: Mar 12, 1985
Inventors
Rolf Rossberg
Peter Schmid
Assignee (at issue)
International Standard Electric 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.