Title:
Piano action
United States Patent 2550153


Inventors:
Ketterman, Sylvan K.
Application Number:
US5845348A
Publication Date:
04/24/1951
Filing Date:
11/05/1948
Assignee:
Ketterman, Sylvan K.
Primary Class:
International Classes:
G10C3/16
View Patent Images:
US Patent References:
2226877Piano action1940-12-31
Foreign References:
GB446730A1936-05-05
GB477242A1937-12-24