Search Results for: Table household articles of cast iron not enamelled
, etc., tightly drawn across, with trumpet mouthed holes, for augmenting the tone of the pianoforte. jan. , . pierre erard. wrest plank and key bottom united by pieces of sheet iron placed between the two sides of the case. new application of patentt of . jan. , i . francis melville. metallic bracing
. , simon thompson. upright piano forte, having the top level with the lock board. feb. , j. c. schwieso. cast iron wrest plank. july, , w. allen. cast iron grooved frame with the wooden wrest plank driven tightly into the grooves. sep. , . f. p. fischer. down striking grand action. nov. , . jacob zeitter...
https://www.piano-tuners.org/history/patents.html