Granted Patent
Utility
US 4,488,772 · App. 06/414,199
Electro-optic indicating device
Inventors:
Thomas Georgopulos, Thomas A. Cioper
Patented Case
View Patent ↗
Granted: Dec 18, 1984
Filed: Sep 2, 1982
Inventors
Thomas Georgopulos
Thomas A. Cioper
Assignee (at issue)
GTE Automatic Electric Incorporated
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.