Australian patent application 2011901578 http://pericles.ipaustralia.gov.au/ols/auspat/applicationDetails.do?applicationNo=2011901578 This is the only patent application I can find for Charter and Brown. The Filing Date is 2011-04-29 and it is LAPSED. If they invented a new POC device I would expect to see a patent application in Australia. Searching Hong Kong patents is difficult but I find nothing. I welcome anyone else to try: http://ipsearch.ipd.gov.hk/patent/main.jsp?LANG=en