Photographic cameras and auxiliary apparatus therefor
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Photographic cameras and auxiliary apparatus therefor
(Patents for interventions : abridgements of specification, class 98 (i))
Patent Office, 1922-1934
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Note
Bound together in one volume, a complete run of 4 publications, 1909-1915, 1916-1920, 1921-1925 and 1926-1930
Includes indexes
