Ericsson joins Intel Capital, Vulcan Capital, Commonwealth Capital Ventures, Khosla Ventures and others backing the nano-resonator technology developer.

Nano-resonator technology developer Sand 9 has raised an additional $3m for its series C round, backed by telecommunications firm Ericsson, just months after closing their first series C round.

The latest round brings the Boston-based firm’s total venture funding to $49m. In June, the firm closed its first series C round for $23m. Led by Intel Capital, the round saw fellow newcomer Vulcan Capital join existing investors Commonwealth Capital Ventures, Flybridge Capital Partners, General Catalyst Partners, and Khosla Ventures in…