Granted Patent
Utility
US 5,229,880 · App. 07/848,632
Three field of view refractive afocal telescope
Inventors:
Harvey M. Spencer, Lacy G. Cook
Patented Case
View Patent ↗
Granted: Jul 20, 1993
Filed: Mar 9, 1992
Inventors
Harvey M. Spencer
Lacy G. Cook
Assignee (at issue)
Hughes Aircraft 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.