Hänvisningar finns i följande patent|
| US3942531 | 11 sep 1974 | 9 mar 1976 | Dornier System GmbH | Apparatus for breaking-up, without contact, concrements present in the body of a living being | | US4370131 | 24 jun 1977 | 25 jan 1983 | Surgical Design | Ultrasonic transducer tips | | US5346502 | 15 apr 1993 | 13 sep 1994 | Ultracision, Inc. | Laparoscopic ultrasonic surgical instrument and methods for manufacturing the instruments |
|
