Born-Digital or AnalogAnalogTranscriptPatents. Denver. Improvement in galvanic batteries; object. R:M.News. Tan. 1, 1876 p.4 c.l John S. Calvert issued patent for goldwasher. R.M.News. Feb. 17, 1876 p.4 c.1 Patent attorney; list of patents granted. R.M.News. Apr. 19, 1876 p.4 c.l List of patents issued. R.M.News. Aug. 25, 1874 p.4 c.3 Clamping machine, John F. Malinckrodt. R.M.News. July 1, 1881 p.l c.2 Denver diamond drill company buys patents. R.M.Nas. Aug. 13, 1882 p.1 c.3CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
