An endoscope having sucking tube lines large in the sucking capacity of the present invention has an insertable part to be inserted into a body cavity and is provided in the front end part of the insertable part with an illuminating window illuminating an observed part, an observing window for observing...http://www.google.es/patents/US4860731?utm_source=gb-gplus-sharePatente US4860731 - Endoscope
