Two Spokane-area technology companies are included in the annual Inc. magazine list of the 500 fastest-growing private firms.

Spokane Valley-based Purcell Systems, which makes power cases and enclosures for telecommunications firms, was ranked 21st.

Liberty Lake-based ISR Inc., also known as Isothermal Systems Research, ranked 286th. ISR designs cooling systems for high-performance electronics components.

Both firms have generated fast sales growth in the past three years, the magazine noted. For Purcell, that came to a 2,272 percent growth in sales over three years. The company reported sales of $24 million in 2004.

For ISR, the three-year growth came to 440 percent, hitting sales of $33 million in 2004, according to the Inc. survey.

Topping the list this year is Video Gaming Technologies, of Roebuck, S.C., which makes touch-screen gaming machines for casinos. Its three-year sales growth came to 9,720 percent, the magazine reported.

The highest-ranking Washington state firm was 180Solutions, of Bellevue, which registered three-year growth of 5,418 percent, the magazine said.

The company develops Web-based applications that give online consumers search-engine access to products or entertainment content.

Three Idaho companies made the list. They are Bodybuilding.com (230th), Bart Larsen Trucking (362nd) and Treetop Technologies (401st).

This is the 24th annual ranking of fast-rising firms published by Inc. To be eligible for this year’s Inc. 500, companies had to be U.S.-based, independent and privately held through their fiscal year 2004, and had to have $500,000 or more in net sales during 2001.