HYPERGON-DOPPEL-ANASTIGMAT 75mm/F48
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ORIGINAL PATENT APPLICATION NUMBER 148,450 FOR IMPROVEMENTS IN OR RELATING TO ELECTRODES FOR ELECTRIC SEARCH LIGHTS (BERLIN). … |
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ORIGINAL PATENT APPLICATION NUMBER 17,071 FOR IMPROVEMENTS IN LEVELS (BERLIN). … |
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ORIGINAL PATENT APPLICATION NUMBER 26,191 FOR AN IMPROVED METHOD AND APPARATUS FOR THE EXPOSURE OF LIGHT SENSITIVE FILMS PLATES OR THE LIKE (BERLIN). … |