This report takes a look into the patenting activity around slot machines uncovering the inventors, the companies and the intellectual property history behind different knee anatomy, its research momentum and key intellectual property indicators. Knee is one of the most important joints of our body. It plays an essential role in movement related to carrying the body weight in horizontal (running and walking) and vertical (jumps) directions. Knee joint is made up of bone, cartilage, ligaments and fluid. Muscles and tendons help the knee joint move. Knee is a pivotal hinge joint, which permits flexion and extension as well as a slight medial and lateral rotation. Since in humans the knee supports nearly the whole weight of the body, it is vulnerable to different injuries. Knee is composed of three functional compartments: the femoropatellar articulation consists of the patella, or "kneecap", and the patellar groove on the front of the femur through which it slides; and the medial and lateral femorotibial articulations linking the femur, or thigh bone, with the tibia, the main bone of the lower leg. The joint is bathed in synovial fluid which is contained inside the synovial membrane called the joint capsule. Overall, the research and development work related to the crutiate ligament appears to be a highly active and growing one. This report focuses on how Patent data can help uncover the trends, gaps and opportunities that exist around this area. You will find the information on the research activity, problem areas, the companies most active in this research area, the filings spread, key comparisons etc. This report was prepared by mining patent data using Patent iNSIGHT Pro, a comprehensive patent analysis platform that helps one accelerate time-to-decision from patent analysis activities.