Granted Patent
Utility
US 4,924,280 · App. 07/403,026
Semiconductor fet with long channel length
Inventors:
Yasuhiro Fukuda, Shooji Kitazawa
Patented Case
View Patent ↗
Granted: May 8, 1990
Filed: Sep 1, 1989
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.