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What is the difference between patent a6 1b5 and patent a6 1f5?
A6 1 Medicine or Veterinary Medicine; Hygiene 200

A6 1B diagnosis; Surgery; Identification (analysis of biological materials G0 1N, for example G0 1N33/48)200

A6 1F implantable intravascular filter; Prosthesis; Devices, such as stents, that provide openings for human tubular structures or prevent them from collapsing; Plastic surgery, nursing or contraceptive devices; Hot compress; Treatment or protection of eyes or ears; Bandages, dressings or absorbent pads; First aid kit (denture A61C) [6,8] 215