Granted Patent
Utility
US 4,933,947 · App. 07/353,870
Frequency conversion of optical radiation
Inventors:
Douglas W. Anthon, Donald Lee Sipes, Jr.
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: May 18, 1989
Inventors
Douglas W. Anthon
Donald Lee Sipes, Jr.
Assignee (at issue)
Amoco 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.