Part of PICRYL.com. Not developed or endorsed by the Library of Congress
Sound - Box : specification of Letters Patent No. 840,974, dated 1907 Jan 8

Similar

Sound - Box : specification of Letters Patent No. 840,974, dated 1907 Jan 8

description

Summary

Diagram and specification detailing Valiquet's improvements in the design of the sound - box/ talking machine.

date_range

Date

01/01/1907
create

Source

Library of Congress
copyright

Copyright info

Public Domain

Explore more

patents
patents