The collection contains product advertisements with descriptions, National Electrical Manufacturers Association Standards, specifications and parts drawings, correspondence with James E. Frykdahl, Head of Coolerator's Engineering Department, and a copy of the firm's public auction.

The collection consists of articles of incorporation, bylaws, annual reports (1940, 1946, 1948, 1954), titles, leases, deeds, stock certificates, financial statements; a list of salesmen (1953); annual roundup program; photograph of George Hill, John Howe, Sig Soberg (1957), and John Hutman; business letters; promotional material; product advertisements; John Patterson correspondence; a company history; and newspaper articles about the company.

The collection consists of six undated photographs, collected by Marvin Meierhoff. The photographs depict the Kelley-How-Thomson Company Building; Marshall-Wells Company Building; and Blake & Waite Company Building in Duluth, Minnesota.