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Expired
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Adolphe Stadelmann
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Individual
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Individual
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Publication of GB191305984ApublicationCriticalpatent/GB191305984A/en
5984. Stadelmann, A. March 20, 1912, [Convention date]. Opera glasses. - In glasses of the type in which the lenses 1, 2 are mounted on arms 3 pivotally connected together, focusing is effected by the sliding up or down of a member 6 embracing the arms 3. The lenses are connected in pairs by dark chambers 9.
GB191305984D1912-03-201913-03-11Improvements in Collapsible Opera Glasses or the like.
ExpiredGB191305984A
(en)