Granted Patent
Utility
US 5,639,152 · App. 08/661,631
Collapsible LCD projector
Inventor:
Brian T. Nelson
Patented Case
View Patent ↗
Granted: Jun 17, 1997
Filed: Jun 11, 1996
Inventor
Brian T. Nelson
Assignee (at issue)
Telex Communications, Inc.
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.