Autopneumatic music-playing instrument.

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US869818A Autopneumatic music-playing instrument. 失效

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Patent Title: Autopneumatic music-playing instrument.
Application No.: US1907363536

Application Date: 1907-03-21
Publication No.: US869818A

Publication Date: 1907-10-29
Inventor: WATSON WILLIAM A
Applicant: EMERSON PIANO COMPANY
Assignee: Emerson Piano Company
Current Assignee: Emerson Piano Company
Priority: US1907363536 1907-03-21

Autopneumatic music-playing instrument.

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