UNT Libraries Government Documents Department - 4 Matching Results

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Bookbinding

This is a letter patent for the bookbinding invention as a means for holding books, pamphlets, catalogs, and other similar paper materials together. The purpose of this invention is to make it possible to place additional material inside the same covers, and with the original contents of a book without breaking or tearing the binding.

Date: June 22, 1911

Creator: Robinson, Edward K.

Item Type: Patent

Apparatus for Transmitting Sound-Waves

Patent for transmitting sound waves by magnetic induction and to "furnish an apparatus by which these different vibrations can be heard at the receiving end" (lines 20-22). Includes descriptions and illustrations.

Date: October 17, 1911

Creator: Harvey, Fred Brown

Item Type: Patent

Doll Novelty.

Patent for a new device, which is a rounded, weighted base placed in a doll that allows the doll to raise itself when turned over on any side without external assistance by lowering the doll's center of gravity. Descriptions of materials used and illustrations are included..

Date: November 4, 1902

Creator: Flint, William G.

Item Type: Patent

Cultivator.

Patent for a cultivator with spring teeth that are stronger than ordinary cultivator teeth.

Date: December 8, 1908

Creator: Baker, Alonzo L. & Baker, Russell

Item Type: Patent

UNT Libraries Government Documents Department - 4 Matching Results

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Bookbinding

Apparatus for Transmitting Sound-Waves

Doll Novelty.

Cultivator.