United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 721
ads of uniform taper slid-ably mounted on said shaft; means for re-taining one of said heads in its adjusted po- 50sition on said shaft: and a spring for holdingthe other head yieldingly in position, for thepurpose specified. In witness whereof I have hereunto set myhand and seal in presence of two… … &tg,3. Oy.^ ^IVitneaiCi
Phonograph · Patents
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