A later (approx. 3 months after the sale was announced) news release announcing the completion of Tektronix' purchase of Cintra, Inc., from Physics International, the majority shareholder of Cintra. The sale was announced on May 7, 1971, and completed in July. The completion of this purcase caused Cintra to become the Tekronix Calculator Division, which marketed Cintra's calculators (an example being the Tektronix 909) under the Tektronix badge, and later, spawned the creation of the Tektronix Model 21 and Model 31 calculators.

Modern Data, August, 1971