Samuel Nelson, Bennet v. Fowler — Opinion of the Court
“ It is difficult, perhaps impossible, to lay down any general rule by which to determine when a given invention or improvements shall be embraced in one, two, or more patents. Some discretion must necessarily be left on this subject to the head of the Patent Office. It is often a nice and perplexing question. It is true, in the present case both patents relate to the lifting and depositing a load of hay in a mow of a barn, or in a rick or shed. ”
