2,497 Matching Results

Search Results

Combined Rubber Dam and Tooth Backing Punch

Description: Patent for a combined rubber dam and tooth-backing punch. "This invention relates to new and useful improvement in dental instruments and more particularly it has references to a punch for forming holes accurately in the backing which is used on teeth in construction of bridges, plates, and cognate work" (line 12-17). Illustration included.
Date: May 19, 1908
Creator: Bell, Harry M.
Partner: UNT Libraries Government Documents Department

Hay Press

Description: Patent for a hay press. This invention includes a reciprocating plunger with plunger heads and designed to work in separate compressing chambers. Illustrations included.
Date: May 19, 1908
Creator: Biela, Valentine
Partner: UNT Libraries Government Documents Department