United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 640
e said opening, a receiving diaphragm, anddevices intermediate of said diaphragm andshutter whereby the latter is operated in ac-cordance with the vibrations of thediaphragm, 30substantially as shown and for the purposeset forth. In testimony whereof I have signed myname to this specification in… … ^.E.
Phonograph · Patents
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