04909789 is referenced by 180 patents and cites 12 patents.

Observation assisting forceps wherein a shaft member is retractably inserted through a hollow sheath, a plurality of linear members given a characteristic of expanding on the tip sides are provided at the front end of this shaft member and spherical parts are provided at the tips of the respective linear members so that the linear members may be projected on the tip sides out of the sheath tip to move aside any organ or the like obstructing the observation with an endoscope.

Title
Observation assisting forceps
Application Number
7/29571
Publication Number
4909789
Application Date
March 24, 1987
Publication Date
March 20, 1990
Inventor
Akira Shiga
Hachioji
JP
Akihiro Taguchi
Hachioji
JP
Agent
Armstrong Nikaido Marmelstein Kubovcik & Murray
Assignee
Olympus Optical
JP
IPC
A61L 17/11
View Original Source