U.S. Supreme Court
Matthews v. Ironclad Mfg. Co., 124 U.S. 347 (1888)
Matthews v. Ironclad Manufacturing Company
Argued December 21-22, 1887
Decided January 23, 1888
124 U.S. 347
A patent for a soda-water fountain, with a specification describing a fountain consisting of a tin lining, with an outer shell of steel, having end caps fastened on,
"without flanges or projections, by tin joints, made by soldering with pure tin, which, being a ringing metal, unites closely with the steel exterior to make a firm and durable joint, as other solders having lead in them will not do,"
and a claim for "the tin vessel, incased by a steel cylinder, and ends soldered to the latter, in the manner substantially as described," was reissued seven years afterwards, with a similar specification and claim except in omitting from the claim the words "steel" and "soldered to the latter." Held that the original patent was limited to a fountain whose outer cylinder and end caps were united by a solder of pure tin, without rivets or flanges; that if the reissue was equally limited, it was not infringed by a fountain with end caps fastened to the chanroblesvirtualawlibrary
outer shell by a solder of half tin and half lead, as well as by rivets, and with vertical flanges at one end through which the rivets passed, and that if the reissue was not so limited, it was void.
Bill in equity for infringement of letters patent. The case is stated in the opinion of the Court.