The round was led by Canada-based investment firm Northwater Capital's Intellectual Property Fund with participation by existing investors, venture capital firm TL Ventures and DuPont Capital Management, which invests on behalf of US-based chemical company DuPont's pension fund.

A US regulatory filing said the round raised its planed $3.6m from six investors.

The fabless chip technology developer has closed a series C round featuring Tokyo Electron, a company which produces its own semiconductor equipment.

The online cash payment platform has taken its total funding to $6.25m, with business platform BetterWorks among the backers.

The web-based social bookmarking service is looking to grow and monetise, using the $6.7m recently raised.

Wayin, set up by Scott McNealy, takes its total raised since it was founded in 2010 to $20m, roughly coinciding with the thirtieth anniversary of Sun Microsystems' founding.

A international syndicate of corporates and venture investors join various US public bodies supporting the energy storage company.