Anyone sending a sketch and description may Quickl O ascertain our opiniOn free whether a inventif n iB probably patentable. Com munica. UoniKtscohentfol. ANDBOOK on Patents sent free, nirient agency Ior securing patets. Patents taken throub Munn & Co. recei ve sI ecial notice, without charge, in the Sc itn tific Am t riCan. A a andsomely Illustrated weekly. Largest I r, oulation o f a ny s cie n tific Journal. Term s, c 3 a year: fo u r m on th s, , 1O old bya all ne wsd ealers. MU;rN tN b & Co.36'Broad- New Dork ' Branch Office . 635 V St.. WasbluKtOu, D. C.
This article was originally published with the title "Patents" in Scientific American 97, 25, 468 (December 1907)