Search Results for: Ivory worked
from e brinsmeads book, when time permits i will add more patents and bring it up to modern times. barrie, oct. , . george joyce and p. east. self acting harpsichord, etc. oct. , jolin harris. harpsichord (no description). dec. , william barton. metal plectra in spinets, etc. dec. , rogerplenius. ivory
and tortoise shell plectra. july , . roger plenius. harp stop and bushed keys. dec. , . burkat shudi. venetian swell over the strings. dec. , . thoomas haxby, "a single harpsichord of two unisons which produces ten variations of stops." may , . richard waizefield. ivory and metal plectra, and wrest...
https://www.piano-tuners.org/history/patents.html