Granted Patent
Utility
US 4,288,147 · App. 06/128,770
Electro-optical composition of the guest-host type
Inventor:
Gene C. Koch
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Mar 10, 1980
Inventor
Gene C. Koch
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.