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Key-Bar.

Patent for key-bars for use on type-writers and cash-registers.

Date: October 30, 1900

Creator: Irish, Gilbert H.

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Trace-Lock.

Patent for a trace lock that is mechanized to work vertically or horizontally. Illustration included.

Date: October 2, 1900

Creator: Halstead, Thomas J.

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Frame-Lifting Device for Disk Plows or Similar Implements.

Patent for "improvements in disk plows and similar implements, and especially to means employed for raising and lowering the frames of said plows in order to regulate the depth of the furrow" (lines 9-13).

Date: October 30, 1900

Creator: Hendon, Walter Preston

Item Type: Patent

Partner: UNT Libraries Government Documents Department

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Key-Bar.

Trace-Lock.

Frame-Lifting Device for Disk Plows or Similar Implements.