Blackberry has sued Twitter on the grounds of patent infringement related to push notifications and mobile advertising. Blackberry is regarded as a pioneer of mobile messaging and also a leading innovator in the field of mobile communications.
It has alleged that Twitter has been using its intellectual property to make up for being a 'relative latecomer to the mobile messaging world. It further adds that Twitter has created mobile messaging applications which co-opt Blackberry's innovations.
Blackberry says that Twitter has been using a number of innovative user interface and functionality enhanced features which has made Blackberry's products achieve their critical and commercial success.