Rembrandt Social Media, LP Files Suit Against Facebook and AddThis, for Patent Infringement

BALA CYNWYD, Pa. – Rembrandt IP Management, LLC (“Rembrandt”) announced that its affiliate, Rembrandt Social Media, LP, has filed a patent infringement lawsuit against Facebook, Inc. and AddThis, Inc. in the U.S. District Court for the Eastern District of Virginia. The patents at issue involve a “Method and Apparatus for Implementing a Web Page Diary,” (US Patent 6,415,316) and a “System and Method for Generating, Transferring and Using an Annotated Universal Address” (US Patent 6,289,362).

The inventor, “Jos” van der Meer, developed his ideas in his Netherlands-based company, which now does business as “Aduna.” After Jos’ passing, the van der Meer family, through Aduna, partnered with Rembrandt to enforce the patents and will share in the litigation proceeds.

“Rembrandt strives to help inventors and patent owners receive the credit and compensation they deserve,” said Dr. Paul Schneck, Rembrandt’s Chairman. “We work to level the playing field for patent owners who do not have the expertise and/or capital, to enforce their rights against companies which use their inventions without paying for them.”

“Years before Facebook and AddThis, Jos van der Meer conceived of and patented core aspects of social media,” Dr. Schneck continues. “The United States patent system is designed to give inventors an exclusive right to practice their inventions. Facebook and AddThis are using the ideas disclosed in Jos’ patents without permission or payment. Through this litigation, Rembrandt Social Media hopes to recover payment for the unauthorized usage of patents by Facebook and AddThis.”

Rembrandt Social Media, LP is represented in this matter by Fish & Richardson, P.C.

About Rembrandt IP Management, LLC

Since 2004, Rembrandt has provided patent owners with the necessary financial capital, in-depth research and analysis, industry expertise, and hands-on litigation management to help monetize their inventions. Rembrandt is comprised of professionals experienced in each of the areas critical to commercializing infringed intellectual property including scientists, attorneys, engineers, licensing executives, and market analysts. Rembrandt aligns with, or acquires patents from, leading innovative corporations, universities, research institutions, the investment community, and entrepreneurial and creative individuals. Rembrandt frequently augments its internal team by engaging “best in class” outside legal and technical experts to assess opportunities and provide their talent and knowledge to obtain a return on infringed intellectual property. For more information please visit