Jan Mikulicz-Radecki invented the deaver retractor. The deaver retractor is a medical device that was invented in the year of 1904.

A volkman retractor is a type of tissue retractor used during ceritan surgeries to separate incised tissues. Google images it for pictures.

it is a self retaining retractor, which is used to retract wound edges.

It is a type of metal retractor used to keep the abdominal cavity open during surgery

The retractor is used orthopedic surgery to retract tissue from bone. Although now commonly called the US retractor, it was developed by military physicians for use in surgery to repair severe injuries sustained in training and combat.