Resolving the 'Kerly Impasse': The Delhi High Court's Landmark Trademark Ruling

A basic procedural conundrum has plagued Indian trademark law for decades: Can a user who was there first but never registered their mark defeat a registered trademark? The certainty of the Registry has been pitted against the equity of common law in this conflict, which has historically been referred to as the "Kerly Impasse" after the landmark trademark law treatise. The courts have long found it difficult to reconcile the "prior user" rights outlined in Section 27(2) with the Trade Marks Act, 1999, which appears to favor the registrant.

The Delhi High Court rendered a final decision in the historic case of Thukral Mechanical Works v. PM Diesel Pvt. in February 2026. Ltd. For brand owners, this decision is more than just an academic update; it represents a fundamental restructuring of how we value, litigate, and defend our brand assets in the cutthroat Indian market. The Court's explicit ruling that a dormant or later-registered trademark cannot defeat a prior user's rights signifies a shift toward protecting "commercial reality" over "procedural perfection."

Key Takeaways

• The certainty of the Registry has been pitted against the equity of common law in this conflict, which has historically been referred to as the "Kerly Impasse" after the landmark trademark law treatise.
• The Delhi High Court rendered a final decision in the historic case of Thukral Mechanical Works v.
• The Court's explicit ruling that a dormant or later-registered trademark cannot defeat a prior user's rights signifies a shift toward protecting "commercial reality" over "procedural perfection." The Concept: What is the 'Kerly Impasse'?
• However, the Delhi High Court examined more than just the registration certificate.
• The Delhi High Court's decision to resolve the "Kerly Impasse" in favor of the previous user has brought India's IPR jurisprudence into line with the real economic goal of trademark law, which is to safeguard legitimate business goodwill and prevent deception.

The Concept: What is the 'Kerly Impasse'?

In essence, the "Kerly Impasse" describes the struggle between the common law rights that result from ongoing use of a mark in commerce and the statutory rights granted by the Registrar of Trademarks.

A brand owner obtains the statutory right to the exclusive use of their trademark upon registration (Section 28). A significant exception is provided by Section 27(2) of the Trade Marks Act, which states that nothing in the Act will impact a person's ability to pursue legal action for "passing off" goods as those of another. To put it another way, a company can sue a later user for "passing off," even if the later user was able to register the mark first, if the company has used the mark for years, developed goodwill, and gained a reputation.

When courts must decide between a "registered owner" who has done little to use the mark and a "prior user" who has developed a sizable business around the mark without formal registration, a deadlock occurs. Which right wins out? For many years, various courts followed different routes, resulting in a disjointed legal system. By demonstrating that the Register is not a "fortress" that can protect a latecomer from the equitable claims of a legitimate, prior owner, Thukral Mechanical Works finally aligns the judicial viewpoint.

The Facts of Thukral Mechanical Works v. PM Diesel Pvt. Ltd.

Two companies in the market for diesel engines and mechanical tools were at odds in Thukral Mechanical Works. The plaintiff, Thukral Mechanical Works, had been using the mark for a number of years before the defendant, PM Diesel, registered it as a trademark. After learning that PM Diesel had obtained a registration and was using the mark to assert exclusivity, Thukral, a smaller but more established operator, effectively accused the previous user of infringement.

The main legal question was whether the plaintiff's common law rights of prior use would be automatically terminated by the defendant's registration of the trademark under the Trade Marks Act's statutory protection. The defendant contended that their registration should legally bar anyone else from alleging infringement since the "Register of Trademark" acts as public notice.

However, the Delhi High Court examined more than just the registration certificate. It looked at the proof of Thukral's commercial activities, their market share, and how long they were in use. The Court's job was to determine whether the "Register" could be used as an offensive tool to silence a long-standing, previous market participant.

The Court’s Verdict: Prior User Prevails

The Delhi High Court made it clear in a thorough ruling that the Trade Marks Act, 1999 does not aim to establish a system in which registration can be utilized as a "license to pirate." The Court established a number of fundamental rules that are currently the standard for IPR litigation:

• The Primacy of Goodwill: The Court ruled that safeguarding the "source" and "goodwill" of products is at the core of trademark law. Although it only documents the underlying business goodwill, registration serves as an evidentiary tool to demonstrate ownership. Registration cannot magically transfer goodwill to the registrant if it was created by someone else that is the previous user.
• The 'Passivity' Factor: The defendant's lack of active, continuous use was a crucial component of the Court's reasoning. The protection of Section 28 (the rights conferred by registration) is not available to a registrant who sits on their registration as a "dormant" asset while a previous user is out in the market creating real value.
• Equity as a Constraint on Statute: The Court reaffirmed that Section 27(2) is an essential component of the statutory scheme and is not an afterthought. It guarantees that the Trade Marks Act will continue to be a tool of justice rather than a technical roadblock. According to the ruling, Section 27(2) serves as a "check" on the exclusivity that Section 28 grants.

For small and medium-sized businesses (SMEs) in India, who are the ones driving the brand in the local market but frequently fail to register their marks early due to a lack of legal awareness, this is a huge victory.

Implications for Corporate Strategy

Every company's "IP hygiene" requirements are drastically altered by this 2026 ruling. If you own a brand, you need to adjust your approach to focus on these three areas:

The Death of the 'Dormant' Registration

Keeping a trademark registration inactive is turning into a risky tactic. Your registration might not be the "shield" you believed it to be if your mark is dormant and a previous user appears. It may even lead to legal action for cancellation due to "non-use."

The Necessity of 'Evidence of Use'

The ruling emphasizes how crucial evidence is. Your accounting, invoices, ads, and market reports are the only things that can protect you from a registrant if you were the previous user. A "Goodwill Ledger"—a digital record of all sales, advertising campaigns, and brand activity that demonstrates your early entry into the market—must be kept up to date.

Vigilance in the 'Oppositions' Window

The best strategy to prevent the "Kerly Impasse" is to identify violations early on. Applications are published in the Trademark Journal; if you come across a mark that you have been using, you should file an opposition right away. Don't wait for your registration to be approved. Once the other party has obtained a registration, the cost of filing an opposition is a small portion of the cost of a full-fledged infringement lawsuit.

Strategic Takeaways for Brand Managers

This precedent is both a guide and a cautionary tale for attorneys and brand managers. Don't limit your trademark search to the Registry's database when looking for a new brand. The Registry does not reveal who is using the mark first, but it does reveal who registered first.

A thorough "Clearance Search" now needs to consist of:

• Common Law Search: Looking through regional industrial listings, social media, local business directories, and newspapers.
• Active Usage Verification: Be extremely cautious before adopting a mark if it is listed in the registry but has no online presence.
• Prior User Documentation: Make sure your "date of first use" is prominently displayed on all internal documents, invoices, and website footers if you are the one using the mark.

The Court has made it clear that the idea that "I registered it, so I own it" is no longer relevant. The trader, not just the applicant, is recognized by law in 2026.

Conclusion

The ruling in Thukral Mechanical Works v. PM Diesel Pvt. Ltd. is a win for the integrity of the Indian market, not just for a particular SME. The Delhi High Court's decision to resolve the "Kerly Impasse" in favor of the previous user has brought India's IPR jurisprudence into line with the real economic goal of trademark law, which is to safeguard legitimate business goodwill and prevent deception.

The "honest trader" is strengthened by this decision, and the "procedural opportunist" is warned. It guarantees that the trademark system is not a race to the filing office but rather a reward for effort and market participation. The most important lesson for businesses is to never confuse a registration certificate with a license to disregard the current competitive environment. Create your brands, put them to use, record your efforts, and if you are the first to market, know that the law now firmly supports your years of diligence.

For more insightful, forward-thinking information on corporate compliance, strategic asset management, and intellectual property engineering, stay tuned to the Vakilkaro Brief.

Official External Resources

Use these primary/official sources to verify rules, forms, fees, timelines and regulatory updates before publication.

• Ministry of Corporate Affairs (MCA)
• IP India - Patents, Designs, Trade Marks & Copyright
• eCourts Services