equipment founded 1878 founder franz hamm anton hamm headquarters tirschenreuth germany area served worldwide key people reinhold baisch stefan klumpp products road rollers revenue 343 million 2015 number of employees ca. 900 dec. 2015 parent wirtgen group website www.hamm.eu hamm 3307 hamm ag is a german worldwide manufacturer and marketer of road rollers based in tirschenreuth germany . it is a subsidiary of wirtgen group . brothers anton and franz hamm who were gunsmiths founded the company in 1878 to build agricultural equipment . the company built their first diesel powered road roller in 1911 from a design by a second generation hamm hans hamm . this was at a time when most rollers where steam powered . in 1928 the company abandoned all other product lines to concentrate on road rollers . hamm produces the first all wheel drive all wheel steering double drum tandem roller and soil compactor with vibration unbalance mass principle in 1932 and retains patent protection rights until 1970 . the company introduced an all wheel steering and all wheel drive rubber wheeled roller in 1963 and then rolled out its oscillating vibratory roller in 1989 . in 1999 the wirtgen group gmbh announced that it would purchase hamm ag and the transaction was completed in march 2000 . external links edit wikimedia commons has media related to hamm vehicles . hamm ag english hamm ag german hamm america hamm india english retrieved from https en.wikipedia.org w index.php title hamm ag & oldid 731176157 categories companies of germanyconstruction equipment manufacturerscompanies established in 1878companies based in bavariagerman brandshidden categories commons category with local link same as on wikidata navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main pagecontentsfeatured contentcurrent eventsrandom articledonate to wikipediawikipedia store interaction helpabout wikipediacommunity portalrecent changescontact page tools what links hererelated changesupload filespecial pagespermanent linkpage informationwikidata itemcite this page print export create a bookdownload as pdfprintable version in other projects wikimedia commons languages deutsch edit links this page was last modified on 23 july 2016 at 14 55 . text is available under the creative commons attribution sharealike license ; additional terms may apply . by using this site you agree to the terms of use and privacy policy . wikipedia is a registered trademark of the wikimedia foundation inc. a non profit organization . privacy policy about wikipedia disclaimers contact wikipedia developers cookie statement mobile view