Granted Patent
Utility
US 5,874,941 · App. 08/534,299
Presentation supporting device
Inventor:
Keizo Yamada
Patented Case
View Patent ↗
Granted: Feb 23, 1999
Filed: Sep 27, 1995
Inventor
Keizo Yamada
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.