UNT Libraries Government Documents Department - 5 Matching Results

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Rotary Drilling-Machine.

Patent for well drilling rigs also known as rotaries that provides a new way for controlling the slips that eliminates all danger of injury to workers.

Date: June 1, 1920

Creator: Black, Lee J.

Item Type: Patent

Patent for a horse boot that covers and protects the hoof and pastern joint of a horse. It also protects the fetlock joint and practically the entire foreleg below the knee. This device allows for the horse to move without being hindered in any way, or without causing chafing. Both protecting the horse and providing additional comfort and safety.

Date: November 1, 1921

Creator: McKenzie, Joseph H.

Item Type: Patent

Well Screen.

Patent for a well screen device. The device can keep particulates out of the well water while also restricting water to flow into the well without being released back into the soil.

Date: February 1, 1921

Creator: McLean, Marrs

Item Type: Patent

Building-Block.

Patent for building block that is easily formed or molded. The building block forms tiers to easy move around and modify.

Date: February 1, 1921

Creator: Pace, Vara L.

Item Type: Patent

Burner.

Patent for improvements in burners to allow them to use liquid fuel such as oil.

Date: June 1, 1920

Creator: Placette, Joeseph G.

Item Type: Patent

UNT Libraries Government Documents Department - 5 Matching Results

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Rotary Drilling-Machine.

Horse-Boot.

Well Screen.

Building-Block.

Burner.