Granted Patent
Utility
US 4,665,412 · App. 06/746,994
Coupled heterostructure superlattice devices
Inventors:
Tihiro Ohkawa, Lawrence D. Woolf
Patented Case
View Patent ↗
Granted: May 12, 1987
Filed: Jun 19, 1985
Inventors
Tihiro Ohkawa
Lawrence D. Woolf
Assignee (at issue)
GA Technologies, Inc.
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.