Improved Implant assemblies and methodologies provide immuno-protection for implanted allografts, xenografts, and isografts. The assemblies and methodologies establish an improved chamber for holding the implanted cells. The chambers include first and second wall elements and an intermediate sealing...http://www.google.ca/patents/US5653756?utm_source=gb-gplus-sharePatent US5653756 - Closed porous chambers for implanting tissue in a host
