OPINION
Louis Kohus (“Kohus”) appeals the district court’s grant of summary judgment in favor of defendants John Mariol, James Mariol, and JVM Innovation & Design (“Defendants”), on Kohus’s claims for copyright infringement. Kohus argues that the district court applied the wrong legal standard, and that the court erred by refusing to consider expert testimony. Having concluded that the Sixth Circuit does not have a settled legal standard in this area, we set out a standard below and remand so the district court may apply that standard.
Statement of Facts
Kohus invents and designs consumer products, including children’s items. In 1987 he formed Kohus/Mariol, Inc. (“KMI”) with John Mariol (“Mariol”). They developed a number of products, including product 11-KMI86, a portable children’s playyard, which included drawings for a latch that would lock the upper rails in place for use. This latch (“the 11-KMI86 latch”) was unlike others on the market in that it had two flippers, or hinges, instead of one, and this gave it a two- *852 step function that could make it safer than comparable latches.
By August of 1988 a serious disagreement had developed between KMI’s shareholders, and Kohus and KMI sued Mariol and his father James (who was also an inventor, and worked with Kohus) in Ohio court. The lawsuit remained unresolved for some six years, though the court did order that in the interim James should maintain control of all KMI’s products and assets. The parties parted ways, and Mariol acted as his father’s agent in handling KMI’s products and assets.
In November of 1994 the KMI litigation finally ended in a settlement. Paragraph two of the settlement agreement provided that “JAMES MARIOL hereby assigns to KOHUS all rights, title and interest, whether known or unknown, that he may now have or hereafter acquire in those ... products identified in Exhibit B ..., including without limitation any .. design drawings[.]” Exhibit B included product 11-KMI86. Consequently, after November of 1994 Mariol no longer had the right to develop or market the 11-KMI86 latch.
In February of 1995 Mariol, who was consulting with Evenflo Juvenile Furniture Co. (“Evenflo”) on a project to develop a collapsible playyard, faxed Evenflo a latch drawing entitled “Joint Version No. 2.” Kohus alleges that this drawing is substantially similar to the 11-KMI86 latch.
In January of 1996 Mariol became a contractor for Kolcraft Enterprises, Inc., where he was assigned to assist another engineer in developing a collapsible play-yard. Mariol and his co-engineer subsequently obtained two patents from the United States Patent and Trademark Office (“PTO”) on playyards they developed at Kolcraft: Patent No. 5,826,285 (“the '285 Patent”), and Patent No. 5,867,851 (“the '851 Patent”). Both of the patent documents present identical drawings of a latch that Kohus alleges was derived from, and substantially similar to, the 11-KMI86 latch. In 1999 Kohus discovered the '285 and '851 Patents while conducting patent searches on the internet, and he then applied for and received a certificate of registration on the 11-KMI86 latch.
Mariol had, in his patent applications, attempted to establish a claim for the allegedly infringing latch, but the patent examiner had not allowed this and had required him to file that claim separately. Mariol subsequently did so, though he amended the patent application with a supplemental information disclosure statement in which he explained to the PTO that Kohus had filed suit against him. In the supplemental disclosure Mariol included the original drawings of the 11-KMI86 latch, though he had not asked Kohus’s permission. The PTO nevertheless rejected the latch-related claims in the patent application, finding that they were “anticipated” by the original drawings of the 11-KMI86 latch.
Kohus filed this lawsuit on October 1, 1999, contending inter alia that three of Mariol’s drawings — Joint Version No. 2, the '285 Patent drawing, and the identical '851 Patent drawing — were substantially similar to the 11-KMI86 latch drawing, and that these three drawings violated his right to create derivatives of the 11-KMI86 latch drawing. The Defendants subsequently filed for summary judgment, arguing that even if the drawings were substantially similar, Kohus’s claims should fail because the Defendants did not have access to the 11-KMI86 latch drawing. After the district court found that they did have access and rejected this motion, the Defendants filed another motion for summary judgment, this time arguing that their drawings were not substantially similar to the 11-KMI86 latch drawing. The district court compared the drawings, and refused to consider the con *853 flicting testimony of experts proffered by each side. It concluded that no reasonable trier of fact could find that the Defendants’ drawings were substantially similar to the 11-KMI86 latch drawing, and held that since Kohus’s substantial similarity argument failed, his derivative copying argument should also fail. Kohus now appeals.
Analysis
I. Whether the Latches Depicted in the Defendants’ Drawings Are Substantially Similar to the Latch in Kohus’s Copyrighted Drawing
A. The Applicable Legal Standard
Summary judgment is proper “if the pleadings, depositions, answers to interrogatories, and admissions on file, together with the affidavits, if any, show that there is no genuine issue as to any material fact and that the moving party is entitled to a judgment as a matter of law.” Fed.R.Civ.P. 56(c). In copyright infringement cases “granting summary judgment, particularly in favor of a defendant, is a practice to be used sparingly,” but “a court may compare the two works and render a judgment for the defendant on the ground that as a matter of law a trier of fact would not be permitted to find substantial similarity.”
Wickham v. Knoxville Int’l Energy Exposition, Inc.,
To succeed in a copyright infringement action, a plaintiff must establish that he or she owns the copyrighted creation, and that the defendant copied it.
Wick-ham,
Not all “copying” is actionable, however: it is a constitutional requirement that a plaintiff bringing an infringement claim must prove “copying of constituent elements of the work
that are original.” Feist Publ’ns, Inc. v. Rural Tel. Serv. Co.,
In
Feist
it was a given that the defendant had copied the plaintiff’s work. For cases like the one before us here, where there is no direct evidence of copy
*854
ing, a plaintiff may establish “an inference of copying by showing (1) access to the ahegedly-infringed work by the defendants) and (2) a substantial similarity between the two works at issue.”
Ellis v. Diffie,
Courts have established various tests for the substantial similarity finding. The traditional approach is the “ordinary observer” or “audience” test, which “requires the trier of fact to gauge the similarities of the two works solely on the basis of his ‘net impression’ and without relying on expert analysis or dissection.”
Id.
at 506 n. 2 (citation omitted);
see also
4 Melville B. Nimmer
&
David NimmeR, Nimmer On Copyright § 13.03[E][1] (1991) (hereinafter “Nimmer”). There are a number of difficulties with this approach,
see
4 Nimmer § 13.03[E][2], and courts have undertaken various modifications — typically, by adding a prior step that does allow expert testimony and analytic dissection.
See Amstein,
The Sixth Circuit has thus far “not adopted a specific test for determining substantial similarity in copyright infringement cases,” Ellis, 111 F.3d at 506 n. 2, and this case presents an opportunity to do so. Our criteria in establishing a test are faithfulness to the law — to Feist, and to our prior caselaw insofar as it is consistent with Feist — and workability.
Feist, as we have seen, favors an approach that involves reducing the comparison to elements that are original. The case does not mention the ordinary observer or audience test and it is not necessarily hostile to that test, but — as Nimmer observes — it requires that courts ask this question: “Does the audience test give content to the Court’s definition of infringing conduct as ‘copying of constituent elements of the work that are original?’ ” 4 Nimmer § 13.03[E][l][b]. We agree with Nimmer’s conclusion: “to the extent that the audience test frustrates that goal, it must be discarded, limited, or tailored to meet the Supreme Court’s formulation.” Id.
Though the Sixth Circuit has not adopted a specific test for substantial similarity, the case
Monogram Models, Inc. v. Industro Motive Corp.,
A two-step approach that reconciles
Feist
and
Monogram Models
is found in
Sturdza v. United Arab Emirates,
The essence of the first step is to filter out the unoriginal, unprotectible elements — elements that were not independently created by the inventor, and that possess no minimal degree of creativity,
see Feist,
Upon any work, and especially upon a play, a great number of patterns of increasing generality will fit equally well, as more and more of the incident is left out. The last may perhaps be no more than the most general statement of what the play is about, and at times might consist only of its title; but there is a point in this series of abstractions where they are no longer protected, since otherwise the playwright could prevent the use of his “ideas,” to which, apart from their expression, his property is never extended.
Nichols v. Universal Pictures Corp.,
Next, in cases like this one, that involve a functional object rather than a creative work, it is necessary to eliminate those elements dictated by efficiency.
See Baker v. Selden,
It is also important to filter out
scenes a faire:
“those elements that follow naturally from the work’s theme, rather than from the author’s creativity,” 4 Nimmee § 13.03[F][3], or elements that are “dictated by external factors such as particular business practices,”
Computer Mgmt. Assistance Co. v. Robert F. DeCastro, Inc.,
Once the unprotectible elements have been filtered out, the second step is to determine whether the allegedly infringing work is substantially similar to the protec-tible elements of the original. We noted above that our
Monogram Models
case establishes that this determination should be based on the judgment of the ordinary reasonable person (i.e., the ordinary lay observer).
See
The ordinary observer test is based on the economic incentive view of copyright law, that the “purpose of the copyright laws [is to] provid[e] creators with a financial incentive to create for the ultimate benefit of the public.”
Dawson v. Hinshaw Music, Inc.,
In cases where the target audience possesses specialized expertise, however, the specialist’s perception of similarity may be much different from the lay observer’s, and it is appropriate in such cases to consider similarity from the specialist’s perspective. The larger principle here is that the inquiry in the second prong of the substantial similarity test should focus on the
intended, audience.
This will ordinarily be the lay public, in which case the finder of fact’s judgment should be from the perspective of the lay observer or, as
Monogram Models
put it, the ordinary reasonable person. But in cases where the audience for the work possesses specialized expertise that is relevant to the purchasing decision and lacking in the lay observer, the trier of fact should make the substantial similarity determination from the perspective of the intended audience. Expert testimony will usually be necessary to educate the trier of fact in those elements for which the specialist will look.
See Dawson,
We also share
Dawson’s
concern that our holding should not be “read as an invitation to every litigant in every copyright case to put before the court the seemingly unanswerable question of whether a product’s audience is sufficiently specialized to justify departure from the lay characterization of the ordinary observer test.”
in any given case, a court should be hesitant to find that the lay public does not fairly represent a work’s intended audience. In our opinion, departure from the lay characterization is warranted only where the intended audience possesses “specialized expertise.” We thereby pay heed to the need for hesitancy when departing from the indiscriminately selected lay public in applying the test. To warrant departure from the lay characterization of the ordinary observer test, “specialized expertise” must go beyond mere differences in taste and instead must rise to the level of the possession of knowledge that the lay public lacks.
Id. at 737.
B. The Legal Standard Applied
The district court in the present case applied the ordinary observer test, only, and on the basis of that test it rejected expert testimony proffered by both Kohus and the Defendants. Instead it analyzed the drawings of the latches on its own, concluding that no reasonable finder of fact could determine that they were substantially similar.
In light of our restated and modified substantial similarity determination procedure, however, it is evident that the district court must conduct its proceedings anew. The first prong of the inquiry will almost certainly require expert testimony, because the drawings are technical in na *858 ture and a lay person is unlikely to understand what constitutes creativity in this area, which elements are standard for the industry, and which elements are dictated by efficiency or by external standards. In conducting the second prong, the district court should consider substantial similarity from the viewpoint of the intended audience, the nature of which the court must determine. This appears to be one of those rare cases where the intended audience is not the lay public: the drawings are technical and are appropriate for patent treatment; interpretational guidance is needed for the lay viewer to imagine the structure and function of the device that the drawings depict; and the initial purchasers of the device would probably be trained engineers, capable of discerning technical niceties that the ordinary person would not detect, and likely to base their purchasing decision on such details.
II. Whether the Defendants Violated Kohus’s Right to Create Derivatives
Kohus, as the copyright holder of the 11-KMI86 latch drawing, has the right to create derivative works from that drawing. See 17 U.S.C. § 106(2) (“[T]he owner of a copyright under this title has the exclusive rights ... to prepare derivative works based upon the copyrighted work[.]”). He claims that the Defendants’ drawings constitute derivative works that violate his rights. The district court, on the basis of its determination that no reasonable person could conclude that the Defendants’ drawings were substantially similar to the 11-KMI86 latch drawing, found that the Defendants’ drawings were not sufficiently similar to constitute a violation of Kohus’s right to produce derivatives.
The district court was correct in determining that Kohus cannot succeed on his derivative claim if the Defendants’ drawings are not substantially similar to his.
See
1 NimmeR § 3.01 (“[A] work will be considered a derivative work only if it would be considered an infringing work if the material that it has derived from a preexisting work had been taken without the consent of a copyright proprietor of such pre-existing work.”);
Litchfield v. Spielberg,
III. Whether Mariol Violated the Disclosure Requirements of 37 C.F.R. § 1.71
Kohus additionally argued to the district court that Mariol violated the requirements of 37 C.F.R. § 1.71 by including the 11-KMI86 latch drawing in the supplemental disclosure to the patent application he filed for his allegedly-infringing latch, because he did so without asking permission and without disclosing that the drawing was copyrighted. The district court did not address this claim, and Kohus now argues that the district court “ignored this probative and uncontroverted evidence and thus committed reversible error.” Appellant’s Brief at 42.
To consider the relevant law: 37 C.F.R. § 1.71(d) provides that:
[a] copyright ... notice may be placed in a design or utility patent application adjacent to copyright ... material contained therein ... Inclusion of a copyright ... notice will be permitted only if the authorization language set forth in paragraph (e) of this section is included at the beginning ... of the specification.
Paragraph (e) then provides the required disclosure: “A portion of the disclosure of this patent document contains material which is subject to [copyright] protection. The [copyright] owner has no objection to *859 the facsimile reproduction ... but otherwise reserves all [copyright] rights whatsoever.” 37 C.F.R. § 1.71(e); see also id. § 1.84(s) (“A copyright ... notice may appear in the drawing, but must be placed within the sight of the drawing immediately below the figure representing the copyright ... material[.]”).
We note, first, that the language of 37 C.F.R. § 1.71(d) is permissive — a copyright notice may be placed in a patent application — and consequently an applicant’s failure to include such a notice in his or her application would not appear to be a violation at all. Even if it were, this fact would have no discernible bearing on Kohus’s substantial similarity or derivative claims, and assuming Kohus can bring suit for a violation, the C.F.R. provides no statutory damages and Kohus alleges no actual damages. We conclude that this claim is meritless.
Conclusion
We vacate the judgment of the district court, and remand for further proceedings in accordance with this opinion.
Notes
. The
Sturdza
case followed the "abstraction-filtration-comparison” approach taken in
Country Kids 'N City Slicks, Inc. v. Sheen,
