for rotatably or swingably mounting, e.g. for boards adapted to be rotated by the wind

Full Title

Signs, name or number plates, letters, numerals, or symbols (vehicle registration number plates B60R13/10); Panels or boards (show-cards G09F1/00; indicating arrangements for variable information G09F9/00, G09F11/00; illuminated signs G09F13/00; boards for notices or posters G09F15/00) > Means for attaching signs, plates, panels, or boards to a supporting structure > for rotatably or swingably mounting, e.g. for boards adapted to be rotated by the wind