I received the same response from investor relations regarding the shareholder meeting. Additionally, I asked about the expiration dates of the patents and the following was provided.
The '148 may have utility post expiration. The five unexpired US patents are:
5,530,890- June 25, 2013
5,604,915- Feb. 18, 2014
5,659,703- Aug. 19, 2014
5,784,584- July 21, 2015
5,809,336- Sept. 15, 2015