US PATENT SUBCLASS 968 / 379
.~ Protection against temperature influences [G04B 43/00C]
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968 /
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HOROLOGY
377
DD
PROTECTING CLOCKWORKS BY SHIELDS OR OTHER MEANS AGAINST EXTERNAL INFLUENCES, E.G., MAGNETIC FIELDS, ETC. (demagnetizing apparatus subclass 783) [G04B 43/00]
{3}
379
.~ Protection against temperature influences [G04B 43/00C]
