Granted Patent
Utility
US 4,403,869 · App. 06/179,383
Electro-optic identifiction code system in a timepiece
Inventor:
William C. Crutcher
Patented Case
View Patent ↗
Granted: Sep 13, 1983
Filed: Aug 18, 1980
Inventor
William C. Crutcher
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.