US PATENT SUBCLASS 968 / 70
.~ By optical indication of the amount of winding [G04B 9/00B]
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June, 1999
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968 /
HD
HOROLOGY
69
DD
SUPERVISION OF THE STATE OF WINDING, E.G., INDICATING THE AMOUNT OF WINDING, ETC, [G04B 9/00]
{2}
70
.~ By optical indication of the amount of winding [G04B 9/00B]
