Tendon Manufacturing ramps up air purifier production Cleveland-based machine shop and fabricator adapts while managing sustainable growth Images provided by Tendon Manufacturing Anyone who’s worked in custom metal fabrication probably knows all about the drop-in order. The customer’s implicit message: We need this yesterday. Those at Tendon Manufacturing, a custom sheet metal and machining operation in Warrensville Heights, Ohio, are drop-in-order veterans, considering their experience in retail displays. When major retailers call, they usually need their displays as soon as possible. ...