Granted Patent
Utility
US 5,386,312 · App. 07/923,759
Collimating lens having doublet element between positive-power elements
Inventor:
Harvey M. Spencer
Patented Case
View Patent ↗
Granted: Jan 31, 1995
Filed: Aug 3, 1992
Inventor
Harvey M. Spencer
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.