Seattle-based Frazier Technology Ventures said today that it participated in a $12 million investment in W5 Networks of Fremont, Calif.

Frazier Technology Ventures led the round along with previous investors, including Thomas Weisel Venture Partners and U.S. Venture Partners. The latest round brings W5 Networks total amount raised to $22 million.

W5 Networks develops wireless technology for the retail industry by replacing paper shelf labels with small displays that can be updated wirelessly.