Horology: time measuring systems or devices – Cases – Of particular material
Patent
1979-01-16
1981-09-29
Miska, Vit W.
Horology: time measuring systems or devices
Cases
Of particular material
429 27, G04B 3700, H01M 1206
Patent
active
042926815
ABSTRACT:
The instrument housing has a gas passage closed-off by a hydrophobic, microporous substance.
REFERENCES:
patent: 3914813 (1975-10-01), Berchielli et al.
patent: 4103483 (1978-08-01), Riley
patent: 4118544 (1978-10-01), Przybyla et al.
Kloss Wolfgang
Sauer Hans
Miska Vit W.
Varta Batterie Aktiengesellschaft
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