| http://www.w3.org/ns/prov#value | - Serial No. 83,095. (No model.) To all whom it may concern.- Be it known that I, THOMAS DE VILBISS, a citizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Speculums; and I do declare the following to be a full, clear, and exact description of. the invention, such as will enable others skilled in the art to w
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