Facebook has filed a legal petition in opposition to the teaching-based social media platform Teachbook for employing the suffix '-book' in its brand name.

Teachbook, a Chicago based firm, portrays as an online community meant for teachers. The social network platform aides' professional teachers to have a knowhow of lesson plans and at the same time have tutorial videos with friends and contemporaries on the platform.

Facebook on the other hand claims that the firm is making use of the goodwill in order to build its own brand. Not only that the social networking site believes that if firms start using the "generic plus BOOK" every now and then it would lead to dilution of brand.

Through a statement released a Facebook official said, "There is already a well known online network of people with 'book' in the brand name. Of course the Teachbook folks are free to create an online network for teachers or whomever, and we wish them well in that endeavour."