In the system provided, a pressure-limiting gas container admits a non-degrading...http://www.google.com.au/patents/US4595121?utm_source=gb-gplus-sharePatent US4595121 - Apparatus and method for dispensing and preserving bottled degradable liquids such as wine and the likeAdvanced Patent SearchPublication numberUS4595121 APublication typeGrantApplication numberUS 06/737,562Publication date17 Jun 1