A prophylactic knee support(s) including a planar impact bar attached to upper and lower mounting bars. The upper and lower mounting bars are fastened to portions of the leg above and below the knee of the user by wraps encircling the appropriate leg portions. Shock absorbers and pressure plates are...http://www.google.fr/patents/US4691697?utm_source=gb-gplus-shareBrevet US4691697 - Knee support
