A heartburn and reflux disease treatment apparatus includes an adjustable restriction device implanted in a patient and engaging the stomach close to the cardia or engaging the esophagus to form a restricted cross-sectional area of the food passageway in the stomach or esophagus, and a post-operation...http://www.google.de/patents/US6470892?utm_source=gb-gplus-sharePatent US6470892 - Mechanical heartburn and reflux treatment
