Granted Patent
Utility
US 5,686,941 · App. 08/711,004
Information recording apparatus having a vacuum system
Inventor:
Yoshiaki Kojima
Patented Case
View Patent ↗
Granted: Nov 11, 1997
Filed: Sep 11, 1996
Inventor
Yoshiaki Kojima
Assignee (at issue)
Pioneer Electronic 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.