Patent US 5268677A

Patent number	US 5268677A (click link for details and documents via Google Patents)
Title	Reduced viewport for graphics display
Inventors	Richard A. Frasier, F. Andrew Witek, William C. Lange, Neil R. Olmstead, Charles Q. Hoard
Company	The Grass Valley Group, Inc.
Filing date	1988-08-04
Grant date	1993-12-07