E. F. Johnson Company Employees. David Cullip. Lois Marie (Horkey) Huerkamp. Material: plastic, paper. Size: 2" x 2" photo transparency mounted in cardboard frame. Description: color photo of three E.F. Johnson Company employees working on the CAD/CAM plotter machine at the E.F. Johnson Company; identified left to right: Dave Cullip; unknown; Lois Marie (Horkey) Huerkamp.