When Facebook faced a patent-infringement lawsuit by Yahoo, countersuing turned out to be an effective strategy, leading to a settlement between the two companies. The social network is apparently hoping for a similar outcome in a patent suit filed against it by Mitel Networks in March.

The Canadian communications outfit claimed in its suit that Facebook infringed on these two patents:

  • 7,292,685, proactive features for telephony, covering systems for proactively suggesting communications features to users.
  • 5,940,834, automatic web page generator, covering automatic Web page generation of organizational directories for use in Internet and Intranet environments.

Much as it did with Yahoo, Facebook filed a countersuit, as reported by The Next Web, involving these two patents:

  • 7,778,396, telephone status notification system.
  • 7,454,709, user-definable online co-user lists.

The Next Web also pointed out that the two patents mentioned in Facebook’s countersuit were among the former AOL patents it acquired from Microsoft for $550 million in April.

Facebook also filed a motion to dismiss Mitel Networks’ suit, according to The Next Web.

Readers: After Yahoo ended up settling its suit versus Facebook, do you think Mitel Networks stands a chance?