Mosaid Technologies resigned 91 patents to Google, 42 of which remain as pending patent applications with the United States Patent and Trademark Office. The transaction was executed on Jan. 27, 2012. These patent filings originated with Pirelli Cavi, now known as Prysmian. They cover a range of fiber optic network technologies. according to Bill Slawski. He lists and links to all the acquired and pending patents.