Granted Patent
Utility
US 4,505,552 · App. 06/486,572
Adjustable electro-optical device
Inventor:
Peter Prohaska
Patented Case
View Patent ↗
Granted: Mar 19, 1985
Filed: Apr 19, 1983
Inventor
Peter Prohaska
Assignee (at issue)
International Standard Electric 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.