Granted Patent
Utility
US 4,987,464 · App. 07/473,740
Encapsulated FET semiconductor device with large W/L ratio
Inventors:
Yasuhiro Fukuda, Shooji Kitazawa
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Feb 2, 1990
Inventors
Yasuhiro Fukuda
Shooji Kitazawa
Assignee (at issue)
OKI ELECTRIC INDUSTRY CO., LTD.
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.