US Expansion Bolt Company v. Jordan Industries, Inc.
Citation | 488 F.2d 566 |
Decision Date | 03 December 1973 |
Docket Number | No. 72-1896.,72-1896. |
Parties | U.S. EXPANSION BOLT COMPANY, Appellant, v. JORDAN INDUSTRIES, INC., et al. |
Court | United States Courts of Appeals. United States Court of Appeals (3rd Circuit) |
D'Agui & Del Collo, Philadelphia, Pa., for appellant; Samuel J. Stoll, and Robert S. Stoll, New York City, of counsel.
Alan H. Bernstein, Caesar, Rivise, Bernstein & Cohen, Philadelphia, Pa., for appellees.
Before HASTIE, VAN DUSEN and GIBBONS, Circuit Judges.
This is an appeal from a judgment in favor of defendants-appellees in a patent infringement action in which plaintiff-appellant's patent, U.S. Patent No. 3,022,701, was adjudged invalid as being reasonably obvious to one with ordinary skill in the art at the time of invention, within the meaning of 35 U.S.C. § 103.1 Because the district court found it unnecessary to decide the issue of infringement, the sole issue on appeal is whether the district court erred in holding plaintiff-appellant's patent invalid on the ground of obviousness.2 Although the facts of this case present a close question on this issue under 35 U.S.C. § 103, after careful consideration of the record and the district court opinion, we affirm the judgment of the district court.
The patent in question relates to an anchor-type wall fastener composed of an anchor and an expanding member. Since both parties adopted the district court's description of the patented device for purposes of the appeal, we repeat that description:
The standard of obviousness as a ground of patent invalidity is set forth in 35 U.S.C. § 103, which provides:
"A patent may not be obtained ... if the differences between the subject matter sought to be patented and the prior art are such that the subject matter as a whole would have been obvious at the time the invention was made to a person having ordinary skill in the art to which said subject-matter pertains."
In Graham v. John Deere Co., 383 U.S. 1, 17, 86 S.Ct. 684, 694, 15 L.Ed.2d 545 (1966), the Supreme Court definitively construed section 103 and established the primary tests for determining whether a patent was obvious at the time of invention:
"Under § 103, the scope and content of the prior art are to be determined; differences between the prior art and the claims at issue are to be ascertained; and the level of ordinary skill in the pertinent art resolved."
See also Anderson's-Black Rock v. Pavement Salvage Co., 396 U.S. 57, 62, 90 S.Ct. 305, 308, 24 L.Ed.2d 258 (1969). We have examined both the record and the district court opinion and have concluded that the district court properly applied the above primary tests and that the district court's findings of fact are not clearly erroneous.
With respect to the scope and content of the prior art,3 plaintiff does not contend that the nylon anchor was a new invention at the time of the patent application. The Patent Office recognized among the prior art two foreign wall anchor patents disclosing anchors which were made of a plastic material such as nylon. Swiss Patent No. 311,726 (1956); French Patent No. 1-122,536 (1956). Moreover, plaintiff stipulated at trial that the nylon anchor used in the patent in suit, both by itself and in conjunction with a plain nail, is prior art against the patent in suit.
Thus, as the district court properly noted, the validity of plaintiff's patent hinges on the question whether plaintiff's "screw-nail" used in combination with a known nylon anchor is obvious or not. Since the defendants came forward with significant prior art not considered by the Patent Office, the presumption of validity attaching to plaintiff's patent in this case4 is weakened. Hadco Products, Inc. v. Walter Kidde, 462 F.2d 1265, 1272 n.33 (3d Cir.1972).
The plaintiff contends that there are three significant differences between the screw-nail expander described in its patent and the anchor expanders taught in the prior art. First, plaintiff claims that the prior art does not show an expansion anchor expanded by a hammer-driven screw means of any kind. Second, plaintiff contends that the prior art does not show a screw-nail — used either in combination with an expansion anchor or by itself — having a non-tapered, nonthreaded shank at its lower end. Finally, and most significantly, plaintiff claims that the prior art does not show a screw-nail having rounded threads. We will consider each of these differences to combine the advantageous features of seriatim.
With respect to the first difference, the prior art clearly evidences attempts to combine the advantageous features of a screw and a nail. In fact, the primary advantages of a hammer-driven screw-nail — greater holding power, easy re-movability, and reusability — were taught by the prior art over a century ago.5 The district court examined the prior art in detail6 and concluded that plaintiff's adaptation of the advantages of the hammer-driven screw-nail for use in an expansion anchor7 would be obvious to one skilled in the art:
We concur with the district court's conclusion that an ordinary mechanic or tradesman could very well decide to use any known screw-nail with a known anchor. The precise characteristics and advantages of the hammer-driven screw-nail had been clearly established in the prior art, and there was nothing to indicate that these advantages would not automatically accrue to the use of the screw-nail in combination with a nylon expansion anchor.
The second difference claimed by the plaintiff — the use of a screw-nail having a non-tapered, non-threaded shank at its lower end — is concededly shown nowhere in the prior art. However, the prior art does show (1) an entirely threaded screwnail with only a slightly tapered shank,8 (2) a partially threaded screw-nail tapered at the lower end,9 and (3) a nonthreaded (plain), cylindrical nail used in combination with an expansion anchor.10 Plaintiff contends that the cylindrical feature of its screw-nail constitutes an extremely significant and patentable advance over the prior art since the nontapered effect creates greater wedging action and, hence, greater fastening strength. We reject this contention since we believe that the use of a cylindrical screw-nail which would not only create greater wedging action but also preserve the distinct advantages of a screw-nail in general would have been obvious to one skilled in the art. A mechanic or tradesman would easily recognize that a screw-nail with no taper would maximize the utility of the nylon fastener.
The final difference claimed by the plaintiff — the rounding of the screw threads — proves most troublesome in resolving the issue of obviousness. Plaintiff argues that there is a crucial difference between sharp and rounded threads when used with anchors consisting of nylon or other plastic material. This difference results primarily from the property of nylon...
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