On April 4, 2006, the Columbus Dispatch reported that Blackwell "owned stock [83 shares, down from 178 shares purchased in January 2005] in Diebold, a voting-machine [and ATM] manufacturer, at the same time his office negotiated a deal" with the company. After discovering the stock ownership, Blackwell promptly sold the shares at a loss.  He attributed the purchase to an unidentified financial manager at Credit Suisse First Boston who he said had, without his knowledge, violated his instructions to avoid potential conflict of interest . 
In 1965 the company added the products of the Lamson Corporation of Syracuse, New York, to its line of office equipment. A maker of materials-handling systems, Lamson became a division of Diebold. Among its products was a message-carrying system that used pneumatic tubes. When Diebold took over, it expanded the operations of the Syracuse plant and invested in research and development, resulting in the computer-regulated tube transport systems that were used to carry material between floors in large office buildings and continue to be used in drive-up remote teller stations. In 1970 Diebold acquired Florida Development Services, a Clearwater, Florida, company that made “ modular ” bank buildings. Those structures, used for small branch offices, could be transported to a site and assembled within 90 days. The following year the name was changed to Diebold Contracting Services, Inc. The concern was sold in 1979.