assignor, for a staple fastener for wooden vessels. The single claim thereof is as follows:
“A fastener tor securing wooden, package covers, formed of a single piece of metal, with tailored shanks, D, and a thin metal plate, A, which is thick enough at its junction with bases, 0, of shanks, D, to form heads, B, for driving the shanks, D, in the wood, as specified.”
The fastener is in the form of a double-pointed staple, so thick at the corners as to furnish sufficient heads for the shanks, and so thin in the center as to he nonelastic, and easily hent over the corners of the wooden box. The specification says:
“The invention consists in a staple whose pointed shanks are projections from a plate which is made so thin at its middle portion as practically to be nonelastic, whereby the shanks, which are driven into the wood, will not be drawn out by the spring of the metal, and at the same time the thickness of the connecting plate shall not be such as to interfere when storing or handling fastened packages, or the, shanks be removed by contact with other articles.”
By this unique construction of a double-pointed staple the inventor so successfully accomplished the object of his invention that his sales amount to 60,000,000 a year, and for .13 years the public have acquiesced in the validity of his patent, except in a single instance, where this defendant co-operated with complainant in successfully stopping infringement by threat of suit.
The defendant manufactures an infringing staple under a patent issued to its president June 22, 1897. Said staple is practically idem deal in construction with that of complainant, except that the middle piece of metal is split and spread apart instead of being flattened. Its purpose and use is the same as that of complainant, as appears from (he following statement in the specification:
“Generally, In such uses, the clasp must be bent over a corner, and the end or ends driven Into the wood of the parts to be secured together. It is therefore important that the end of the tang or prong to be driven should be sharp; that the body of said prong should be stiif enough to penetrate the wood without bending; that the part Immediately adjacent to the prong should be of sufficient body to constitute a good driving surface; that the remainder of the body intermediate the ends should be wide enough to make a good bearing surface where it rests against the parts to be secured, and should also be flexible enough to bend readily at almost any point intermediate the prongs (if ihere are two), that it may be easily applied to the intended use.”
The defenses alleged are as follows: (I) 'Limitation of the claim by proceedings in the patent office, and denial of infringement by reason thereof; (2) denial of invention in view of the prior art; (3) anticipation.
There is nothing in the first point. All that Swett, the patentee, did, was to acquiesce in the action of the patent office in rejecting two of his three claims, leaving the second claim exactly as it was originally drawn. A mere remark of the examiner, “It is not seen that there is any material difference in the claims,” does not estop the patentee from claiming the construction shown by the specification and original claim. It is the cons traction of the patent as finally issued which is to be considered.
Reece Buttonhole Mach. Co. v. Globe Buttonhole Mach. Co., 10 C. C. A. 194, 61 Fed. 958. Defendant says that, because the examiner, in rejecting the other claims,