Where the owner name is not linked, that owner no longer owns the brand
Technical Examples
A button structure of saxophone comprising of a treble E button, a side C linking rod button and a side B linking rod button; the bottom of the treble E button and the top of the side C linking rod button oblique upward 25° from left to right, the intersection and the horizontal direction of the finger hook form an upward 25° angle; the highest curve point of the side C linking rod button and the side B linking rod button are on the ¾ of the side C linking rod button and the side B linking rod button respectively, then declines from the high points downward on both sides to the rims of both buttons; players fell the reduction of the height difference and increase the contact area while playing that offers smoother play with less errors.