Granted Patent
Utility
US 5,420,064 · App. 08/310,076
Method of manufacturing a dielectric isolation substrate
Inventors:
Kensuke Okonogi, Tsukasa Ohoka
Patented Case
View Patent ↗
Granted: May 30, 1995
Filed: Sep 22, 1994
Inventors
Kensuke Okonogi
Tsukasa Ohoka
Assignee (at issue)
NEC 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.