Citation Codes Equivalent Citations citation codes Docket Number No. 590, No. 617. Attorney(S) Thomas E. Scofield for J. Preston Swecker William L. Mathis for Original Tractor Cab Co., , et al. See more information ... Smart Summary Please sign up to generate summary. CLAPPER v. ORIGINAL TRACTOR CAB CO., INC., ET AL; AND ORIGINAL TRACTOR CAB CO., INC., ET AL. Mr. Justice Whitaker took no part in the consideration or decision of these applications.