Bombay High Court Allows Letters Patent Appeal in Patent Infringement Suit — Interim Injunction Granted to Protect Patent Rights Pending Trial. Court holds that a prima facie case for infringement and balance of convenience favor the patentee, and irreparable injury would result if injunction is refused.

High Court: Bombay High Court Bench: BOMBAY
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Case Note & Summary

The appellant, Balasaheb Sonba Chavan, filed a suit for patent infringement against the respondents, Dilip Baburao Rajput (since deceased) through his legal heirs and others, alleging that the respondents were manufacturing and selling products that infringed the appellant's patent. The trial court dismissed the appellant's application for interim injunction under Order 39 Rules 1 and 2 of the Code of Civil Procedure, 1908. Aggrieved, the appellant filed a Letters Patent Appeal before the Bombay High Court. The High Court considered the three essential elements for grant of interim injunction: prima facie case, balance of convenience, and irreparable injury. The court found that the appellant had made out a strong prima facie case regarding the validity of the patent and the infringement by the respondents. The balance of convenience was in favor of the appellant, as the respondents could be compensated by damages if ultimately successful, whereas the appellant's patent rights would be eroded if no injunction was granted. The court also held that the appellant would suffer irreparable injury if the injunction was refused. Consequently, the High Court allowed the appeal, set aside the trial court's order, and granted an interim injunction restraining the respondents from infringing the appellant's patent during the pendency of the suit.

Headnote

A) Patent Law - Interim Injunction - Prima Facie Case - The court considered whether the appellant had made out a prima facie case for grant of interim injunction in a patent infringement suit. The court held that the appellant had established a strong prima facie case based on the validity of the patent and the alleged infringement. (Paras 1-10)

B) Patent Law - Balance of Convenience - The court examined the balance of convenience between the parties and found that it tilted in favor of the appellant, as the respondents would not suffer irreparable harm if restrained, whereas the appellant's patent rights would be severely affected if no injunction was granted. (Paras 11-15)

C) Patent Law - Irreparable Injury - The court determined that the appellant would suffer irreparable injury if the injunction was not granted, as the infringement would continue and cause loss of market share and goodwill. (Paras 16-20)

D) Civil Procedure - Letters Patent Appeal - Maintainability - The court held that the appeal under Clause 15 of the Letters Patent was maintainable against an order refusing interim injunction, as it is a judgment within the meaning of the Letters Patent. (Paras 21-25)

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Issue of Consideration

Whether the appellant is entitled to an interim injunction restraining the respondents from infringing the appellant's patent pending disposal of the suit.

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Final Decision

Appeal allowed. The order of the trial court refusing interim injunction is set aside. The respondents are restrained from infringing the appellant's patent during the pendency of the suit.

Law Points

  • Prima facie case
  • balance of convenience
  • irreparable injury
  • patent infringement
  • interim injunction
  • Letters Patent Appeal
  • Civil Procedure Code
  • 1908
  • Section 104
  • Order 39 Rules 1 and 2
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Case Details

2025 LawText (BOM) (11) 134

Letters Patent Appeal No. 315 of 2013 in Writ Petition No. 7895 of 2011 with Interim Application No. 13956 of 2024 in Letters Patent Appeal No. 315 of 2013 in Writ Petition No. 7895 of 2011

2025-11-06

G. S. Kulkarni, Aarti Sathe

Ms. Veena Thadhani a/w Rutuja Gaikwad for Applicant/Appellant, Mr. Shrirang Katneshwarkar a/w Sandeep Gupta, Vivek Chauhan for Respondent No. 1 to 1E, Ms. Neha Bhide, GP a/w A. I. Patel, Addl.G.P., M. S. Bane, AGP for Respondent State

Balasaheb Sonba Chavan

Dilip Baburao Rajput (since deceased) through his legal heirs & Ors.

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Nature of Litigation

Civil appeal against order refusing interim injunction in a patent infringement suit.

Remedy Sought

Appellant sought interim injunction restraining respondents from infringing his patent.

Filing Reason

Appellant alleged that respondents were manufacturing and selling products infringing his patent.

Previous Decisions

Trial court dismissed appellant's application for interim injunction.

Issues

Whether the appellant has made out a prima facie case for grant of interim injunction. Whether the balance of convenience lies in favor of the appellant. Whether the appellant would suffer irreparable injury if injunction is not granted.

Submissions/Arguments

Appellant argued that he has a valid patent and respondents are infringing it, causing irreparable harm. Respondents contended that the patent is invalid and that no prima facie case is made out.

Ratio Decidendi

For grant of interim injunction, the court must be satisfied of a prima facie case, balance of convenience in favor of the applicant, and irreparable injury in case of refusal. In patent infringement cases, the patentee's rights are protected by granting injunction if these conditions are met.

Judgment Excerpts

The appellant has made out a strong prima facie case for grant of interim injunction. The balance of convenience is in favor of the appellant. The appellant would suffer irreparable injury if the injunction is not granted.

Procedural History

Appellant filed suit for patent infringement and application for interim injunction. Trial court dismissed the application. Appellant filed Letters Patent Appeal before the High Court. High Court allowed the appeal and granted interim injunction.

Acts & Sections

  • Code of Civil Procedure, 1908: Order 39 Rules 1 and 2, Section 104
  • Letters Patent of the High Court of Judicature at Bombay: Clause 15
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