A surgical endoscopic instrument for operating on anatomical tissue includes a rigid barrel, a shaft extending through the barrel and an offset endoscope mounted on the shaft. The endoscope is offset from the longitudinal axis of the shaft by a transverse connecting member, thereby permitting the endoscope...http://www.google.ca/patents/US6277064?utm_source=gb-gplus-sharePatent US6277064 - Surgical instrument with rotatably mounted offset endoscope
