Granted Patent
Utility
US 6,442,984 · App. 09/546,753
Security system in an extend unit for a computer
Inventors:
Katsutoshi Katoh, Tetsuya Ohtani, Shigeru Ishii, Yoshiharu Uchiyama
Patented Case
View Patent ↗
Granted: Sep 3, 2002
Filed: Apr 11, 2000
Inventors
Katsutoshi Katoh
Tetsuya Ohtani
Shigeru Ishii
Yoshiharu Uchiyama
Assignee (at issue)
International Business Machines 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.