Granted Patent
Utility
US 4,392,102 · App. 06/258,532
Liquid crystal indicator
Inventors:
Raymond K. Sugalski, Charles R. Blake
Patented Case
View Patent ↗
Granted: Jul 5, 1983
Filed: Apr 28, 1981
Inventors
Raymond K. Sugalski
Charles R. Blake
Assignee (at issue)
General Electric Company
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.