Cannell, M. B. (Inventor), Soeller, C. (Inventor) & Beddeley, D. (Inventor), 25 Feb 2020, US PATENT OFFICE, Patent No. US10571674B2, 28 Mar 2018, Priority date 24 Oct 2010, Priority No. NZ58819910
Soeller, C. (Inventor), Baddeley, D. (Inventor) & Cannell, M. (Inventor), 20 Dec 2016, Patent No. US9523846 B2, Priority date 24 Sept 2010, Priority No. US 13/825,794