Assignee
QUESTECH LTD
US12 patents
Top patents by PatentIndex Score
US6239846B1May 29, 2001
Digital video effects, apparatus and method
QUESTECH LTD25 citations91
US5663868ASep 2, 1997
Stackable electronic equipment assembly with improved circuit board cooling arrangement
QUESTECH LTD54 citations91
US5153726AOct 6, 1992
Recording and editing of moving television pictures
QUESTECH LTD38 citations91
US5293233AMar 8, 1994
Digital video effects with image mapping on to curved surface
QUESTECH LTD9 citations72
US4918530AApr 17, 1990
Processing of video image signals
QUESTECH LTD10 citations72
US4847691AJul 11, 1989
Processing of video image signals
QUESTECH LTD9 citations72
US4879597ANov 7, 1989
Processing of video image signals
QUESTECH LTD12 citations68
US5227884AJul 13, 1993
Processing of video image signals
QUESTECH LTD4 citations62
US5524091AJun 4, 1996
Accurate digital divider
QUESTECH LTD3 citations61
US5220428AJun 15, 1993
Digital video effects apparatus for image transposition
QUESTECH LTD3 citations61
US5822015AOct 13, 1998
Providing an accurate tally indication of sources in use for output
QUESTECH LTD3 citations50
US5067133ANov 19, 1991
Error-correction of stored television signals
QUESTECH LTD0 citations50