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Mind Over Patent: T-Mobile Case Gives India Its First Section 3(m) Playbook

Gaurav Mishra · · 6 min read

Three cartoon brains - one doing yoga, one lifting weights, one reading — symbolising purely mental acts and exercises of the human mind, the category of 'invention' excluded from patentability under Section 3(m) at issue in the T-Mobile patent ruling. Featured image for: Mind Over Patent: T-Mobile Case Gives India Its First Section 3(m) Playbook

Summary

T-Mobile International AG and Co. KG appealed the Patent Office's refusal of its mobile-terminal patent application on grounds including Section 3(m) of the Patents Act, the exclusion for a mere scheme, rule or method of performing a mental act. After disposing of the appeal on merits and remanding it for fresh consideration, the Delhi High Court kept the matter open to address a gap both sides acknowledged: the absence of any settled test for evaluating Section 3(m) objections. With the assistance of an amicus curiae, the court laid down a structured seven-step framework, complete with illustrations, for determining when a claim falls foul of the mental act exclusion. The ruling gives patent examiners, applicants and courts their first detailed roadmap for this long under-defined provision.

Background

India’s patent regime has long lacked a clear roadmap for one of its most misunderstood exclusions, the bar on patenting a “mere scheme or rule or method of performing mental act.” That gap has now been filled, in an appeal that began as an ordinary patent refusal and ended with the Delhi High Court laying down a seven-step test for examiners, applicants and courts alike.

T-Mobile International AG and Co. KG (“T-Mobile”) had filed patent application No. 468/DELNP/2008, titled “Method and Arrangement for Optimising the Operational Times and Cell Change Performance of Mobile Terminals,” which the Controller General of Patents, Designs and Trademarks (“Patent Office”) refused on December 29, 2016, citing objections under Section 3(k) and Section 3(m) of the Patents Act, 1970 (“Patents Act”). T-Mobile appealed the refusal. The Delhi High Court had already heard arguments on the merits and, by an order dated February 26, 2026, remanded the application for de novo consideration by the Patent Office. During those hearings, however, counsel for both sides candidly conceded that no settled guidelines existed for how the Patent Office ought to evaluate objections under Section 3(m). The court kept the appeal pending for the limited, public-interest purpose of resolving that gap, and appointed an amicus curiae to assist.

Issues

    • What test should govern the examination of objections under Section 3(m) of the Patents Act, given the absence of settled guidelines.
    • Whether the four limbs of Section 3(m), a mere scheme, rule, or method of performing a mental act, and a method of playing a game, are to be read disjunctively and independently of the novelty and inventive-step inquiry under Sections 2(1)(j) and 2(1)(ja).
    • Whether a claim reciting physical means or a computer implementation can still be excluded under Section 3(m), or whether it falls instead to be examined under Section 3(k).

T-Mobile’s Submissions

    • T-Mobile’s patent application concerned a method for optimising operational timing and cell-change performance of mobile terminals, a claim it maintained involved physical, technical implementation rather than a purely mental exercise.
    • Counsel for T-Mobile fairly acknowledged, along with the Patent Office, that no guidelines existed for evaluating Section 3(m) objections, and sought the court’s assistance in settling a workable standard.

Patent Office’s Position

    • The Patent Office had refused the application in 2016 on the combined grounds of Section 3(k) and Section 3(m), treating the claimed method as falling within the excluded categories.
    • Counsel for the Patent Office joined T-Mobile in submitting that the absence of guidelines made consistent examination of Section 3(m) objections difficult, and supported the court’s decision to seek amicus assistance.

Amicus Curiae’s Submissions

    • The amicus curiae traced the legislative history of Section 3 of the Patents Act, from the absence of any equivalent provision in the 1911 Act, through the Patents Bill of 1953, to its final form as recommended by the Justice Ayyangar Committee.
    • The amicus highlighted that Section 3(m) is pari materia with Article 52(2)(c) of the European Patent Convention, and relied on decisions of the European Patent Office’s Boards of Appeal, including T 914/02 (General Electric), T 619/02 (Quest International), and T 471/05 (Philips), to demonstrate how the “mental act” exclusion has been applied to claims involving varying degrees of physical implementation.
    • The amicus submitted, and the court accepted, that the exclusion must be assessed by looking at the claim as a whole rather than by isolating individual steps that happen to involve mental activity.

Court’s Analysis

Reading the Four Limbs of Section 3(m)

The court held that Section 3(m), separated by the disjunctive “or,” carves out four distinct exceptions: a mere scheme, a mere rule, or a mere method of performing a mental act, and a method of playing a game. The court reasoned that the word “mere” qualifies the first three limbs, confining the exclusion to claims that amount solely to a mental act and nothing more. The court further observed that a “mental act” is an act of the mind, such as calculation, reasoning, evaluation, cognition or judgement, and that Parliament, by pairing mental acts with methods of playing games, intended to exclude activities that operate purely in the realm of logic and cognition rather than upon physical matter.

Independence from Novelty and Inventive Step

The court found that objections under Section 3(m) mental act patent exclusion are analytically distinct from the tests for novelty and inventive step under Section 2(1)(ja) of the Patents Act, and must not be conflated with them. The court stated that an invention may well satisfy the threshold for novelty and inventive step, yet still be refused under Section 3(m), because the exclusion targets what the claim monopolises rather than whether the claimed advance is obvious or trivial.

The Seven-Step Guidelines

Drawing on the amicus’s report and the reasoning in Koninklijke Philips N.V. v. Maj (Retd.) Sukesh Behl (2025 SCC OnLine Del 1121) and Lava International Ltd. v. Telefonaktiebolaget LM Ericsson (2024 SCC OnLine Del 2497), the court laid down the following structured framework for examining Section 3(m) mental act patent exclusion objections:

    1. Construe the claim in light of the specification, as a person skilled in the art would, without importing limitations from the specification into the claim.
    2. Product claims are not hit by Section 3(m): a genuine product claim, such as an apparatus or device defined by its physical features, cannot be objected to under this provision at all.
    3. Identify what is monopolised: for a process claim, read the claim as a whole; it must not be dissected into individual steps to isolate one that happens to involve a mental act.
    4. Apply the mental act test: ask whether the claim, as construed, could be infringed by a person doing nothing but thinking, reasoning, calculating or deciding. If so, it monopolises a mental act and is excluded.
    5. Disregard token additions: a nominal, post-solution physical step, such as printing or displaying a result, does not save a claim where the substance of the monopoly remains a mental act.
    6. Do not conflate with novelty and inventive step: the Section 3(m) inquiry is independent of Sections 2(1)(j) and 2(1)(ja), and a claim is not excluded merely because it appears obvious or trivial.
    7. Separate treatment for computer-implemented claims: where a claim recites physical means integral to its performance, or hardware and software interacting to produce a tangible output, Section 3(m) is not attracted; claims performed by a computer must instead be examined separately under Section 3(k), not disposed of under Section 3(m).

Findings

In view of the observations and the amicus’s report, the Delhi High Court held that:

    • Section 3(m) postulates four disjunctive exceptions, with “mere” qualifying the first three, and is confined to claims that amount to nothing more than a mental act.
    • Objections under Section 3(m) are independent of, and must not be conflated with, the tests for novelty and inventive step.
    • A seven-step guideline framework, covering claim construction, treatment of product claims, assessment of the claim as a whole, the “mental act” test, the treatment of token physical additions, separation from novelty and inventive-step analysis, and the distinct treatment of computer-implemented claims under Section 3(k), shall govern examination of Section 3(m) objections.
    • The guidelines, along with illustrative examples, shall be placed before the Controller General of Patents and Designs for appropriate steps within six weeks of the order.
    • The appeal, having already been disposed of on merits by the order dated February 26, 2026, and kept pending solely for framing these guidelines, stood finally closed.

Case Citation: T-Mobile International AG and Co. KG v. The Controller General of Patents, Designs and Trademarks & Anr., C.A.(COMM.IPD-PAT) 149/2022, Delhi High Court, decided on August 4, 2026.

Authored by Gaurav Mishra, Patent Attorney, BananaIP Counsels

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