United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 117
disk in the plane of the face thereof. 55 4. A record element for sound reproduc-ing machines, having in the face thereof asound groove which in its general directionadvances and recedes transversely as the ele-ment is revolved, the said element having cOtherein an eccentrically dispo.sed… … WITNESSES INVENTOR cJ^/z C.Ahg^is/i BV /(/vKbu
Phonograph · Patents
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