Granted Patent
Utility
US 4,870,563 · App. 07/036,754
Information processing apparatus having a mask function
Inventor:
Tetsuji Oguchi
Patented Case
View Patent ↗
Granted: Sep 26, 1989
Filed: Apr 8, 1987
Inventor
Tetsuji Oguchi
Assignee (at issue)
NEC 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.