Licensee estoppel

A royalty payment is a payment made by one party to another that owns a particular asset, for the right to ongoing use of that asset. Royalties are typically agreed upon as a percentage of gross or net revenues derived from the use of an asset or a fixed price per unit sold of an item of such, but there are also other modes and metrics of compensation. A royalty interest is the right to collect a stream of future royalty payments.

The first-sale doctrine is an American legal concept that limits the rights of an intellectual property owner to control resale of products embodying its intellectual property. The doctrine enables the distribution chain of copyrighted products, library lending, giving, video rentals and secondary markets for copyrighted works. In trademark law, this same doctrine enables reselling of trademarked products after the trademark holder puts the products on the market. In the case of patented products, the doctrine allows resale of patented products without any control from the patent holder. The first sale doctrine does not apply to patented processes, which are instead governed by the patent exhaustion doctrine.

Intellectual property rights (IPRs) have been acknowledged and protected in China since 1980. China has acceded to the major international conventions on protection of rights to intellectual property. Domestically, protection of intellectual property law has also been established by government legislation, administrative regulations, and decrees in the areas of trademark, copyright, and patent.

In United States patent law, patent misuse is a patent holder's use of a patent to restrain trade beyond enforcing the exclusive rights that a lawfully obtained patent provides. If a court finds that a patent holder committed patent misuse, the court may rule that the patent holder has lost the right to enforce the patent. Patent misuse that restrains economic competition substantially can also violate United States antitrust law.

The doctrine of assignor estoppel is a doctrine of United States patent law barring a patent's seller (assignor) from attacking the patent's validity in subsequent patent infringement litigation. The doctrine is based on the doctrine of legal estoppel, which prohibits a grantor from challenging the validity of his/her/its grant.

The exhaustion doctrine, also referred to as the first sale doctrine, is a U.S. common law patent doctrine that limits the extent to which patent holders can control an individual article of a patented product after a so-called authorized sale. Under the doctrine, once an authorized sale of a patented article occurs, the patent holder's exclusive rights to control the use and sale of that article are said to be "exhausted," and the purchaser is free to use or resell that article without further restraint from patent law. However, under the repair and reconstruction doctrine, the patent owner retains the right to exclude purchasers of the articles from making the patented invention anew, unless it is specifically authorized by the patentee to do so.

Statutory damages are a damage award in civil law, in which the amount awarded is stipulated within the statute rather than being calculated based on the degree of harm to the plaintiff. Lawmakers will provide for statutory damages for acts in which it is difficult to determine a precise value of the loss suffered by the victim. This could be because calculation of a value is impractical, such as in intellectual property cases where the volume of the infringement cannot be ascertained. It could also be because the nature of the injury is subjective, such as in cases of a violation of a person's rights. The award might serve not only as compensation but also for deterrence, and it is more likely to succeed in serving a deterrence function when the potential defendants are relatively sophisticated parties. Other functions that can be served by statutory damages include reducing administrative costs and clarifying the consequences of violating the law.

An implied license is an unwritten license which permits a party to do something that would normally require the express permission of another party. Implied licenses may arise by operation of law from actions by the licensor which lead the licensee to believe that it has the necessary permission.

Lear, Inc. v. Adkins, 395 U.S. 653 (1969), is a decision of the U.S. Supreme Court overturning the doctrine of licensee estoppel and holding that public interest considerations require that licensees be free to challenge the validity of possibly spurious patents under which they are licensed. This entailed the overruling of Automatic Radio Mfg. Co. v. Hazeltine Research, Inc. and prior cases that it had reaffirmed.

The doctrine of non-derogation from grants is a principle of the law of England and Wales. As the House of Lords explained in British Leyland Motor Corp. v. Armstrong Patents Co., it states that a seller of realty or goods is not permitted to take any action that will lessen the value to the buyer of the thing sold.

Motion Picture Patents Co. v. Universal Film Mfg. Co., 243 U.S. 502 (1917), is United States Supreme Court decision that is notable as an early example of the patent misuse doctrine. It held that, because a patent grant is limited to the invention described in the claims of the patent, the patent law does not empower the patent owner, by notices attached to the patented article, to extend the scope of the patent monopoly by restricting the use of the patented article to materials necessary for their operation but forming no part of the patented invention, or to place downstream restrictions on the articles making them subject to conditions as to use. The decision overruled The Button-Fastener Case, and Henry v. A.B. Dick Co., which had held such restrictive notices effective and enforceable.

Pope Mfg. Co. v. Gormully, 144 U.S. 224 (1892), was an early United States Supreme Court decision refusing, on public policy grounds, to enforce an agreement not to contest patent validity. The Supreme Court later relied on Pope in Lear, Inc. v. Adkins as authority in support of overruling the doctrine of licensee estoppel. That doctrine had prohibited patent licensees from challenging the validity of patents under which they had been licensed.

Blonder-Tongue Labs., Inc. v. University of Ill. Foundation, 402 U.S. 313 (1971), is a decision of the United States Supreme Court holding that a final judgment in an infringement suit against a first defendant that a patent is invalid bars the patentee from relitigating the same patent against other defendants. In so ruling, the Supreme Court overruled its 1936 decision in Triplett v. Lowell, which had required mutuality of estoppel to bar such preclusion, and held that the better view was to prevent relitigating if the plaintiff had had a full and fair opportunity to litigate the issue in question.

Minerva Surgical, Inc. v. Hologic, Inc., 594 U.S. ___ (2021), was a United States Supreme Court case dealing with the principle of assignor estoppel and its application. The Supreme Court reaffirmed the principle of assignor estoppel, however with the exception that the doctrine is only applied when assignors assertions are actually consistent with previous representations as to the patent. The majority decision was written by Justice Elena Kagan, with Justice Samuel Alito and Justice Amy Coney Barrett filing separate dissenting opinions.