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  2. Fair use - Wikipedia

    en.wikipedia.org/wiki/Fair_use

    the effect of the use upon the potential market for or value of the copyrighted work. The fact that a work is unpublished shall not itself bar a finding of fair use if such finding is made upon consideration of all the above factors. [9] Joseph Story wrote the opinion in Folsom v. Marsh.

  3. Fair use (U.S. trademark law) - Wikipedia

    en.wikipedia.org/wiki/Fair_use_(U.S._trademark_law)

    Descriptive fair use: Using a descriptive mark in an ordinary, descriptive manner to describe a product or service. For example, describing a component within a dehumidifier as "honeycomb-shaped" was a fair use of a registered trademark for HONEYCOMBE dehumidifiers. [1] In other words, for descriptive fair use to arise, the following must be true:

  4. Copyright Act of 1976 - Wikipedia

    en.wikipedia.org/wiki/Copyright_Act_of_1976

    Additionally, the fair use defense to copyright infringement was codified for the first time in section 107 of the 1976 Act. Fair use was not a novel proposition in 1976, however, as federal courts had been using a common law form of the doctrine since the 1840s (an English version of fair use appeared much earlier).

  5. Derivative work - Wikipedia

    en.wikipedia.org/wiki/Derivative_work

    A "derivative work" is a work based upon one or more preexisting works, such as a translation, musical arrangement, dramatization, fictionalization, motion picture version, sound recording, art reproduction, abridgment, condensation, or any other form in which a work may be recast, transformed, or adapted.

  6. Nominative use - Wikipedia

    en.wikipedia.org/wiki/Nominative_use

    The nominative use doctrine was first enunciated in 1992 by the U.S. Court of Appeals for the Ninth Circuit in New Kids on the Block v. News America Publishing, Inc. [4] In New Kids on the Block, the court had examined a "New Kids on the Block survey" performed by the defendant, and found that there was no way to ask people their opinion of the band without using its name.

  7. Transformative use - Wikipedia

    en.wikipedia.org/wiki/Transformative_use

    Transformative use. In United States copyright law, transformative use or transformation is a type of fair use that builds on a copyrighted work in a different manner or for a different purpose from the original, and thus does not infringe its holder's copyright. Transformation is an important issue in deciding whether a use meets the first ...

  8. Wikipedia:Image use policy - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Image_use_policy

    Fair-use images should almost never be included as part of a general image gallery, because their "fair use" status depends on their proper use in the context of an article (as part of analysis or criticism). See Wikipedia:Fair use for details. An example of an exception might be a gallery of comparable screenshots from a video game as it ...

  9. Desargues's theorem - Wikipedia

    en.wikipedia.org/wiki/Desargues's_theorem

    In projective geometry, Desargues's theorem, named after Girard Desargues, states: Two triangles are in perspective axially if and only if they are in perspective centrally. Denote the three vertices of one triangle by a, b and c, and those of the other by A, B and C. Axial perspectivity means that lines ab and AB meet in a point, lines ac and ...