Water tight watch case using an inorganic glass crystal

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G04B 3708

Patent

active

039396460

ABSTRACT:
A water-tight watch case having an inorganic glass crystal to which a layer of transparent or semi-transparent water-absorptive material is applied to a central region of the inner surface thereof to leave a bare peripheral region at which the crystal is hermetically sealed to the case.

REFERENCES:
patent: 3052083 (1962-09-01), Piquerez
patent: 3261159 (1966-07-01), Simon et al.

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