Patents Detail

Patents

Pfizer Inc v Cosmos Limited, IPT Case No. 49 of 2006 (Ruling, Industrial Property Tribunal) [2008]

Parties
Pfizer Inc v Cosmos Limited
Court
Industrial Property Tribunal of Kenya
Bench
Tags
Patent infringement ARIPO patent enforcement
Date
2026-08-26

Facts

Pfizer alleged Cosmos Limited manufactured, imported and sold Azithromycin Dihydrate under the trademark "Zithrox" without authorisation, infringing ARIPO Patent AP44. Cosmos admitted the conduct in 2005 but stopped after a cease-and-desist letter.

Issues

Whether the ARIPO patent remained valid and in force in Kenya, given renewal-fee and lapse questions; whether infringement occurred despite Cosmos's denial of intent; and the applicability of TRIPS/parallel-importation defences.

Rule

Industrial Property Act, s.106 (infringement proceedings before the Tribunal) and s.59 (ARIPO patents under the Harare Protocol have the same effect as nationally granted patents).

Analysis

The Tribunal found the patent had been maintained on the register and was valid. It held patents are territorial and rejected the TRIPS/parallel-import defences as inapplicable.

Conclusion

The Tribunal found infringement, granted an injunction restraining further infringement for the remaining patent term, and ordered destruction of remaining infringing stock.

Note: this ruling is reported via specialist IP law commentary (Afro-IP and Strathmore CIPIT) rather than a digitized primary kenyalaw.org record, as Industrial Property Tribunal rulings from that era do not appear to be digitized there.

Frequently Asked Questions

Frequently Asked Questions

The IP Case Law Database is a repository of case briefs summarising rulings and judgments related to intellectual property law in Kenya. It covers various types of IP, including copyrights, trademarks, patents, and more.

The database is open to legal practitioners, researchers, scholars, and students interested in the field of intellectual property law in Kenya. It is designed to be a useful tool for anyone seeking to understand the legal precedents that shape IP law in the country.

The database features cases across all areas of intellectual property law, including copyright infringement, trademark disputes, patent issues, and cases involving industrial designs and utility models. It also includes cases related to collective management organisations and royalty collection.

We aim to update the database regularly to ensure that it contains the latest rulings and judgments. New cases are added as soon as they are available to keep our users informed about the latest developments in IP law.

Yes, the database is fully searchable. You can search by case name, type of intellectual property, legal issue, or court decision. This allows you to quickly find relevant case briefs based on your research needs.

Each case brief includes key details such as the facts of the case, the legal issues at hand, the court’s ruling, and a summary of the legal analysis. This structure helps users quickly understand the critical points of each ruling.

In addition to the case briefs, we provide links to full-text judgments where available. This ensures that users can access the complete legal reasoning and details if they need more in-depth information.

To cite cases from our database, you should follow standard legal citation practices. Each case brief includes the official case reference, making it easy to include in your legal documents or research papers.

At this time, the database is curated by legal experts and researchers. However, we welcome suggestions for cases to include or features to improve the platform. Please contact us through our support page if you have feedback or suggestions.