RIM files countersuit against Visto

Canada-based BlackBerry creator Research In Motion (RIM) filed a countersuit against Visto, a software company that sued RIM last week over patents on wireless email, an Associated Press report said.

The report said RIM sought a declaration from a federal court in Dallas that it did not infringe on the Visto patents.

It also, in effect, asked that the issue be decided in Dallas rather than in Marshall, Texas, where Visto sued RIM on Friday after winning a similar suit against rival Seven Networks, the report said.

The Visto suit threatened to draw RIM into another long drawn-out legal proceeding. In March, RIM agreed to pay NTP $612.5 million to settle a four-year patent dispute, the report said.