Partnership Buys Center in Upland

A partnership of principals of the Muller Co. and Occidental Development Fund III has acquired the Upland Technology Center near Central Ave. in Upland from American Telecommunications Corp. Financing in the amount of $5.37 million was provided by Weyerhaeuser Mortgage Co., Irvine.

Existing structures--called Phase 1 by the new owners--total 179,440 square feet, of which 150,600 consists of air-conditioned manufacturing space and the remainder is improved office space, in four connected buildings on 19.1 acres. One manufacturing building was constructed in 1964, the others and the office building in 1983, Weyerhaeuser said.

Lockheed Aircraft Service Co., a division of Lockheed Corp., has leased 112,390 square feet in the existing buildings. The Muller Co. is headquartered in Newport Beach and the Occidental fund is a limited partnership. Weyerhaeuser Mortgage has offices throughout California, the Pacific Northwest and Arizona.