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Hydraulic Periscope Elevating System Patent Print Patent Title: Hydraulic Periscope Elevating System Inventor Name: Kollmorgen Ernst...read more
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Hydraulic Periscope Elevating System Patent Print Patent Title: Hydraulic Periscope Elevating System Inventor Name: Kollmorgen Ernst O Year Issued: April 11 1950 Item Number: 15063 Reprint of original Patent Patent is printed on premium ac...