Samuel Blatchford, American Cotton-Tie Company v. Simmons…
“ The slot through the end-bar of the buckle in the Cook patent is of no practical use apart from the band and the bale of cotton, and the same thing is true of the link of the McComb patent with its arrow-shaped aperture; and, although a per son who merely makes and sells the buckle or link in each case may be liable for infringing those patents, he is so liable only as he is regarded as doing what he does with the purpose of having the buckle or link combined with a band and used to bale cotton. ”
