Research In Motion shares are down again in the wake of reports that it has lost a round in a patent dispute with Nokia Corp.

The European cellphone giant has licensed some of its patented technology to the BlackBerry maker.

However, an arbitrator has ruled RIM breached their agreement and should be prevented from using certain technology unless it reaches a deal with Nokia.

Nokia says it's asking courts in Canada, the United Kingdom and United States to enforce the arbitrator's ruling.

Research In Motion says it won't comment on litigation before the courts.

RIM's shares dropped to as low as $10.15 early in the session Wednesday on the Toronto Stock Exchange but recouped some of the loss to trade down nine cents, or 0.84 per cent, at 10.61 mid-morning.