This was recently approved: DEVICE FOR CORRECTING HALLUX VALGUS AND METHOD FOR PRODUCING DEVICE FOR CORRECTING HALLUX VALGUS
European Patent Application EP2524675
I assume its worn when you are NOT weight bearing?
Since HAV has a large pathomechanical aetiology related to 1st MTPJ mechanics whilst walking i'm calling this an EPIC FAIL!
Patents are essentially granted for novelty....not necessarily for effectiveness.
Trying to brace this while non-weight bearing will essentially be a monumental failure.