Granted Patent
Utility
US 6,445,800 · App. 09/489,774
Audio signal reproducing apparatus
Inventors:
Masayuki Nishiguchi, Yoshihito Fujiwara
Patented Case
View Patent ↗
Granted: Sep 3, 2002
Filed: Jan 24, 2000
Inventors
Masayuki Nishiguchi
Yoshihito Fujiwara
Assignee (at issue)
SONY GROUP 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.