Facebook is getting sued over its "like" button by Rembrandt Social Media, patent owners of technologies of a company called Surfbook. Not a lot is known about Surfbook but according to the BBC it was a "social diary" letting people share information and approve data using a "like" button.
Apparently the company was founded by Joannes Jozef Everardus van Der Meer, who died in 2004. Rembrandt Social Media is claiming two of Mr Van Der Meer's patents were used without permission (however there is no mention of what the second patent may be). The patents were granted in 1998 and Facebook even cited them in its own patent applications.
"We believe Rembrandt's patents represent an important foundation of social media as we know it, and we expect a judge and jury to reach the same conclusion based on the evidence," said lawyer Tom Melsheimer from legal firm Fish and Richardson, which represents the patent holder.
Facebook told the BBC that it had no comment to make on the lawsuit or its claims.
Update: According to NBC News the second patent infringement claim involves Facebook Timeline. Also mentioned is that Mr Van Der Meer had purchased the domain Surfbook.com in order to utilize said patents, but due to his death the project never materialized.