Patent US 3819984A

Patent number	US 3819984A
Title	Side-by-side dual gun crt having horizontal deflector plates provided with side shields for correction of geometric distortion
Inventors	Ken Hawken
Company	Tektronix Inc
Filing date	1973-02-12
Grant date	1974-06-25
Cites

This patent describes the T7840 CRT used in the 7844 scope.