US PATENT SUBCLASS 348 / 188
.~.~ Using test chart
Current as of:
June, 1999
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348 /
HD
TELEVISION
180
DF
MONITORING, TESTING, OR MEASURING
{6}
187
DF
.~ Testing of camera {1}
188
.~.~ Using test chart
DEFINITION
Classification: 348/188
Using test chart:
(under subclass 187) Subject matter wherein the means includes an optical pattern containing a group of lines and circles for testing the performance of the TV camera.