Tyco Electronics and Sun Microsystems, companies with headquarters in Menlo Park's industrial zone, are household names. But there are a number of lesser-known companies located in the area, some of which generate a considerable amount of sales tax revenue. A sampling of those companies:

■ Acclarent, 1525 O'Brien Drive: Maker of balloon catheters, used in nasal surgery.

■ Al's Roofing Supply, 985 O'Brien Drive: Sells roofing material, such as shingles and tiles, as well as insulation. Menlo Park location is one of four in the Bay Area.

■ D.M. Figley Co., 10 Kelly Court: Sells sealants. Menlo Park outlet is one of three Bay Area locations.

■ Guckenheimer food service, 149 Commonwealth Drive: Operates corporate cafeterias; began as a sandwich cart in the Stanford Medical School. Corporate offices in Menlo Park and Redwood City.

■ Horizon, 4060 Campbell Ave.: Sells sprinkler systems and fertilizers, as well as other gardening supplies. Has a retail outlet in Menlo Park.

■ OfficeMax, 1315 O'Brien Drive: International office-supply company has a distribution center in Menlo Park.

■ Pacific Biosciences, 1505 Adams Drive: Maker of DNA sequencing technology.

■ Velocity11, 3565 Haven Ave.: Makers of robots for a laboratory environment.

■ XTENT, 125 Constitution Drive: Develops technology that aids in treating heart disease.

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