Frames, casings or beds of engines, machines or apparatus, not specific to

Official title: for supporting on, or holding steady relative to, a person, e.g. by chains {, e.g. rifle butt or pistol grip supports, supports attached to the chest or head (apparatus or arrangements for taking photographs or for projecting or viewing them G03B)}

F16M13/04 (Frames, casings or beds of engines, machines or apparatus, not specific to) appears on 1,314 US grants and 1,509 published applications in this corpus.