OnePatont Software Ltd is a small software company headquartered in Mumbai, India, which licenses its patents. Most of the company's IP in this space falls into the Marketplace category, and has to do specifically with dynamic searching. The company does not look to be very active in filing, with only one published new application since late 2016. OnePatont is also not afraid of going after companies for infringement. In 2011 they sent a patent infringement notice to Facebook and many other companies, including Twitter and LinkedIn, which led to multiple reexaminations that ended in favor of OnePatont.