It was Karl Benz's aim to construct a vehicle in which engine, chassis, and drive formed an organic unit. His "Patent-Motorwagen"("patent motor-vehicle"), for which he was granted the patent DRP-37435 on 29 January 1886, was not based on a converted carriage but represented an own integral design. In the years 1885-87 Karl Benz developed three different versions ; of the first two only one unit was constructed. On a vehicle of the third version Bertha Benz, together with her sons Richard and Eugen, was doing the legendary drive from Mannheim to Pforzheim , the first long-distance drive in the history of automobiles at the beginning of August 1888. |