The "Hymac" brand name has been used in several variations over the years (Lower case, all caps and hyphenated versions) in the companies own marketing material and the livery/ decals on the machines. HY-MAC/HYMAC/Hymac being the most common variations. HY-MAC was the US Registered Trade Mark of the Hydraulic Machinery Company America. The actual UK company HYMAC LIMITED dates back to 1946. The HY-MAC trade Mark was assigned to HYMAC LIMITED in 1972.