Class 168/41 - Friction

Subclass of Class 168 - Farriery
Definition: Calk and shoe joined by a tenon-and-socket connection, the
No. of patents: 1
Last issue date: 02/13/1979

Number	Title	Issue Date
4139061	Convertible racing plate with exchangeable calks On both heels of a racing plate a boss is formed having a top surface lying substantially flush with the top surface of the shoe, and an upwardly facing opening including a shallow recess and a mortise extending completely through the shoe is formed in ea...	02/13/1979

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