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5h 43min, jan 2, 1920 y - Tri ergon group(germany) and Lee de forest(US) made optical sound: took care of synchonization
Added to timeline:
Art History Final
By
Bethany Walker
8 Nov 2017
0
0
415
Date:
5h 43min, jan 2, 1920 y
Now
~ 105 years ago
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