Granted Patent
Utility
US 4,247,928 · App. 06/086,009
Integral lightpipe and display holder for a timepiece
Inventor:
Leonard M. Dorfman
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Oct 17, 1979
Inventor
Leonard M. Dorfman
Assignee (at issue)
Timex 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.