The Wing Sung 601 is another one in the chinese Parker wannabees that have become widely prevalent in the pen market recently. Despite the design changes (i.e. the ink window etc), there are clear elements that appear to constitute intellectual property infringement. For example, based on https://www.fountainpennetwork.com/forum/topic/160565-35-parker-arrows/ the Parker clip arrow is based on trademark No 1178088 which was originally issued in 1932 but is valid today see http://tsdr.uspto.gov/#caseNumber=+1,178,088 and belongs to Newell Rubbermaid Inc. I am not a lawyer but it appears that we have a clear intellectual property infringement case. I am very interested in hear from all of you regarding the legal, ethical and other aspects of this issue, including the responsibility of ebay, amazon etc in assisting the sale of such products.