Granted Patent
Utility
US 4,872,080 · App. 06/638,095
Protective circuit for a semiconductor laser
Inventors:
Christian Hentschel, Wolfgang Schmid
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: Aug 6, 1984
Inventors
Christian Hentschel
Wolfgang Schmid
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.