United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 377
FIG 4 … THE NORR1S PETERS CO . WASHINGTON. D. C. IO 5 20 3° UNITED STATES PATENT OFFICE. LAURENT GARDY, OF PERPIGNAN, FRANCE. SOUND-BOX WITH COUPLED DIAPHRAGMS FOR DISK TALKING-MACHINES. No. 828,309. Specification of Letters Patent. Patented Aug. 14, 1906. Application filed November 29,1905. Serial No,…
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents], 1878, leaf 377](https://img.insideoutlibrary.com/img/1024/ia-graphophonepaten07unit-377-254.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten10unit-613-411.webp)
