FORBES - July 24 - Spark Network's Jdate discreetly filed a lawsuit late last year against Jswipe, the Jewish ‘Tinder’, claiming intellectual property over the letter “J” within the Jewish dating scene. Jdate also claims it owns the patent on software that “confidentially determines matches and notifies users of mutual matches in feelings and interests.” Jswipe, like Tinder, notifies users when their romantic interest ‘swipes right’ on their picture, violating Jdate’s patent. It is not clear why Jdate only goes after Jswipe. There are other apps using "J" including Jcrush, Jwed, Jzoog. Spark Networks refused to comment.