Knee Joint Bone Patents (Class 623/20.14)
- Ball and socket joint (Class 623/20.22)
- Including roller bearing (Class 623/20.23)
- Constrained joint (Class 623/20.24)
- Including cam means to limit anterior and posterior movement (Class 623/20.27)
- Including an intermediate member (Class 623/20.28)
- Unicondylar (Class 623/20.3)
- Including lateral and medial condyles (Class 623/20.31)