Photograph of the engineering staff at Preco Incorporated, ca.1950. Four men sit around a table, perhaps discussing plans. Behind them, more men can be seen, at work on other tables with bending lamps. Each table is strewn with paperwork, and an assortment of office supplies. At right, a wall of windows brings in the outdoors, where an automobile is parked.; Photoprint reads: "Engineering heads -- these are the heads of the engineering division at Preco Incorporated, Los Angeles. Their newest creation is the power brush vacuum cleaner attachment for canister cleaners that features a revolving brush that operates solely on air power generated by the cleaner itself. From left to right: Paul Beemer, vice president; G.M. Magarian; S.B. O'Dell; P.Z. Anderson".