Henry Billings Brown,
Duer v. Corbin Cabinet Lock Company…
“ While the testimony of a patentee in derogation of his own patent is usually open to some suspicion, this opinion is so obviously correct that it needs only a comparison of his device with those of Gory and Spiegel to confirm it.It is true the Orum lock seems to have gained an immediate popularity, to have met with large and increasing sales, and to have had the usual effect of successful patents, in stimulating the activity of business competitors to produce an equally useful and popular device. ”
