U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 405
plate h, electric conductors making connec-tion through the said lamp respectively to the said shell and pivot-stud and to the said plate,and additional conductors extending fromsaid plate and said stud to the poles of thebattery, substantially as set forth. 15 In witness whereof we have hereunto… … Attest; ^^^-z^v; *
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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