An anastomotic device for receiving the free ends of anatomic tubular structures to be anastomosed, the device having a pair of ring members for securement to the free end of each of the tubular members to be anastomosed and the ring members having annular connecting structures which mate with each other...http://www.google.de/patents/US4552148?utm_source=gb-gplus-sharePatent US4552148 - Anastomotic device
