United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 628
rding receiver closedat the back of the opening for the soundwaves, and having its funnel extending fromsaid opening transversely to the direction inwhich the sound waves enter, and having aslit at the base of the opening, substantiallyas described. In testimony whereof I have hereunto setmy hand… … Wi~rr\/£Z s s fiTvS •
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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