Anyone sending a sketch aid description may quickly ascertain our- opinion free whether. is probably-patentable. Communications strictly confidential. Handbook on Patents sent free.off detergency for securing patents. Patents taken throes MUNN&CO. receive Special Notice, without charge, in the Scientific American Broadway, New York Washington, D.C.
This article was originally published with the title "Patents" in SA Supplements 56, 1443supp, 159 (August 1903)