What are the advantages of the piano's inlaid string pillow? It seems that this is the patent of Harmani piano. Why do I see that all other pianos are imitations?

The embedded chord pillow structure accurately casts a groove embedded with a stainless steel strip with a diameter of 2.5 mm at the tenor chord pillow of the piano. The contact precision between the strings and the chord pillow is much higher than that of the traditional chord pillow structure, which makes the piano more stable in pitch and purer in sound quality. This is the patented technology of Harmani piano, and now it is copied by Helen and other pianos.