
In patent infringement cases, the victorious party may be awarded treble damages. However, companies can seek invalidity opinions to demonstrate good faith and avoid such damages. Invalidity opinions are legal opinions obtained by clients to evaluate litigation risks and freedom to operate. These opinions can be used as a defense strategy to demonstrate that the infringement was not willful. The effectiveness of this strategy depends on the competence of the opinion and the absence of adverse facts. While obtaining an invalidity opinion can be costly, it may be a critical piece of evidence in limiting liability and shielding against treble damages.
| Characteristics | Values |
|---|---|
| Can invalidity opinion shield treble damages from a patent lawsuit? | Yes, an invalidity opinion can be used as a defense to shield treble damages from a patent lawsuit. |
| Basis | Treble damages are awarded in cases of willful infringement. An invalidity opinion can demonstrate that the infringement was not willful, as the defendant acted in good faith to avoid infringement. |
| Examples | - Loggerhead Tools, LLC v. Sears Holding Corp.: The court found that the defendant's consultation with a patent attorney to develop an invalidity opinion was "highly probative evidence of good faith," and found no willful infringement. |
| - Jiaxing Super Lighting Electric Appliance Co., Ltd. et al v. CH Lighting Technology Co., Ltd. et al: The court found CH liable for willful infringement but did not award treble damages due to the defendant's good-faith argument of invalidity after submitting their answer. | |
| Challenges | Presenting an invalidity opinion as a defense waives the attorney-client privilege for communications related to the opinion. |
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What You'll Learn

Invalidity opinions and attorney-client privilege
Attorney-client privilege protects confidential communications between a lawyer and their client that relate to the client's seeking of legal advice or services. This protection extends to any information exchanged during these privileged communications, encompassing not only verbal discussions but also written correspondence, emails, text messages, and other forms of communication.
However, the attorney-client privilege is not absolute and can be waived under certain circumstances. For example, if a client uses their attorney's advice as a defence or if there is a third party present during the communication who is not essential to the attorney-client relationship, such as an interpreter. In the context of patent litigation, companies often seek legal opinions, such as invalidity opinions, to demonstrate that they acted in good faith to avoid infringement. However, presenting an opinion of counsel waives the attorney-client privilege for communications relating to that opinion. This is based on the theory that a party cannot use privilege as both a sword and a shield.
To mitigate the risk of waiving attorney-client privilege, it is crucial to distinguish between opinion counsel and trial counsel. Opinion counsel provides legal advice and drafts the opinion, while trial counsel focuses on litigation strategies. Restricting access to the opinion to only those internal personnel who require it to fulfil their roles can also help to maintain privilege.
Additionally, when obtaining an invalidity opinion, the alleged infringer should carefully consider the timing and potential consequences, as using an invalidity opinion may trigger a waiver of attorney-client privilege.
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The risk of treble damages
Treble damages refer to a statute that allows a prevailing plaintiff to receive up to three times the actual or compensatory damages. These are awarded in civil court cases and are meant to be punitive, acting as a deterrent to others who might commit the same offence. Treble damages differ from traditional punitive damages in that they are designed to provide additional compensation to the aggrieved party. They are often invoked for willful violations of state or federal statutes, such as patent infringement, willful trademark counterfeiting, and antitrust violations.
Companies often seek legal opinions, such as non-infringement and invalidity opinions, to mitigate the risk of treble damages. These opinions demonstrate that the company acted in good faith to avoid infringement. However, relying solely on these opinions can be challenging, as presenting an opinion of counsel waives the attorney-client privilege for related communications. This is based on the theory that a party cannot use privilege as both a sword and a shield. To safeguard attorney-client privilege while relying on the opinions-of-counsel defence, it is crucial to distinguish between opinion counsel and trial counsel. Opinion counsel provides legal advice and drafts the opinion, while trial counsel focuses on litigation strategies.
The distinction between the roles of trial counsel and opinion counsel is important in maintaining attorney-client privilege. The Federal Circuit recognises the different functions of these roles, with trial counsel serving as advocates and opinion counsel providing objective assessments for informed business decisions. By clearly separating these roles, companies can avoid subject matter waiver concerns related to attorney-client privilege.
To further mitigate the risk of treble damages, companies should restrict access to internal personnel who genuinely need it to fulfil their roles. This reduces the risk of a broader waiver and ensures that privileged information is only disclosed to those who require it.
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Willful infringement
The Federal Circuit has established that there are two distinct tests for willfulness and enhanced damages. Willfulness is the lower standard, requiring only deliberate or intentional infringement. On the other hand, enhanced damages require egregious conduct on the part of the infringer, such as "wanton, malicious, and bad-faith behavior." This distinction is crucial, as it impacts the calculation of damages in patent infringement cases.
The evolution of the test for willful infringement has been influenced by several key cases. In Seagate, the Federal Circuit set forth an objective-recklessness standard, which was later rejected by the Supreme Court in Halo Electronics, Inc. v. Pulse Electronics, Inc. The Supreme Court found the Seagate standard too rigid and replaced it with a subjective willfulness test, focusing on the intentional or knowing nature of the infringement.
The impact of the Halo decision is significant, as it has lowered the evidentiary standard for patent holders to establish willfulness. As a result, courts are now less likely to grant summary judgments of no willful infringement, and the possibility of enhanced damages has increased. This shift in the legal landscape has important implications for companies facing patent infringement claims, as they must navigate the evolving standards and strategies to mitigate potential damages.
To mitigate the risk of treble damages, companies often seek legal opinions, such as non-infringement and invalidity opinions, to demonstrate good faith efforts to avoid infringement. However, presenting an opinion of counsel waives attorney-client privilege for related communications. This presents a challenge, and companies must carefully consider their legal strategies to balance the risks and privileges involved.
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The role of the factfinder
In this process, the factfinder examines the exculpatory opinion, the opinion writer, and the opinion reader, who may all testify at trial. The factfinder's decision hinges on whether the opinion provided the defendant with a sufficient basis to form a good-faith belief as to the lack of infringement. This good-faith belief is a critical defence for companies facing patent infringement claims, as it demonstrates their intention to avoid infringement.
To establish this good-faith belief, companies often seek legal opinions, such as non-infringement and invalidity opinions, to show that they acted diligently to avoid infringement. However, presenting these opinions as evidence can be a double-edged sword, as it waives attorney-client privilege for communications related to the opinion. This waiver has been a significant consideration since the Halo decision, influencing the timing of waivers and the types of opinions sought to avoid willfulness findings.
The distinction between opinion counsel and trial counsel is crucial to maintaining attorney-client privilege. Opinion counsel provides legal advice and drafts the opinion, while trial counsel focuses on litigation strategies. This separation ensures that the privilege is only disclosed to those with a need to know, reducing the risk of a broader waiver.
In summary, the factfinder plays a pivotal role in evaluating the defendant's belief in the lack of infringement, invalidity, or unenforceability of a patent. Their determination of the competence and reasonableness of the defendant's belief sets the course for the court's decision on awarding enhanced damages. The factfinder's assessment of the exculpatory opinion and related testimonies is a key piece of evidence in the overall patent infringement litigation process.
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The Halo decision
The decision highlights the importance of the distinct roles of trial counsel and opinion counsel. Trial counsel acts as an advocate, focusing on litigation strategies, while opinion counsel provides objective legal assessments to inform business decisions. By clearly separating these roles, companies can maintain attorney-client privilege while relying on the opinions-of-counsel defense.
To further safeguard attorney-client privilege, companies should restrict access to internal personnel with a genuine need to know. This reduces the risk of a broader waiver and ensures that privileged information is disclosed only to those who require access.
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Frequently asked questions
Treble damages refer to a situation where a victorious patent owner in a patent infringement suit may be awarded up to three times the damages incurred.
Companies often seek legal opinions, such as noninfringement and invalidity opinions, to demonstrate that they acted in good faith to avoid infringement. These opinions can be used as evidence to show that the infringement was not willful and may help reduce the damages awarded.
Presenting an opinion of counsel waives the attorney-client privilege for communications relating to that opinion. This means that the company may have to disclose sensitive information and legal strategies.
Treble damages are typically awarded in cases of willful infringement, where the infringer deliberately copied the patentee's ideas or designs, failed to investigate the patent, or engaged in misconduct during litigation.



































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