U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 105
circle divided into tenequal parts representing ten minutes of time 80and subdivided into half-minutes and alsohaving a series of inner circles, on which areplaced the names of articles to be cooked andarrows indicating the stages of cooking, sub-stantially as described. 85 In witness whereof I…
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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