Semi-automatic needle retraction, i.e. in which triggering of the needle retraction requires

Official title: {Semi-automatic needle retraction, i.e. in which triggering of the needle retraction requires a deliberate action by the user, e.g. manual release of spring-biased retraction means}

A61M5/3232 (Semi-automatic needle retraction, i.e. in which triggering of the needle retraction requires) appears on 369 US grants and 361 published applications in this corpus.