Patent Opposition Database

Search our database of international drug patent oppositions

Example searches: India, "India 2004", atazanavir, TDF, AIDS, US 5599670, etc.

Search 175 applications, 484 oppositions and 229 drugs across 36 organisations

We need your help and contributions

Are you a…

Chemist?

We need your help finding prior art for drugs with no oppositions

See drugs with no oppositions

Legal expert?

We need your help finding and uploading new patent applications and oppositions

See drugs with no data

Civil society organisation?

Interested in opposing a patent application in your country but need specialist help?

Join our community

Recent additions

A patent application was updated on Delamanid (Delamanid)
04-06-2026
A patent opposition was added to MK-8527 (NA)
01-06-2026
A patent opposition was updated on Delamanid (Delamanid)
28-05-2026
A patent opposition was updated on Pembrolizumab [KEYTRUDA] (PEMBRO)
28-05-2026
A patent opposition was updated on Cabotegravir and Rilpivirine (CABENUVA) (CAB/RPV)
28-05-2026

Contribute

Calls for help

Product

Melody Jerde II
Posted on: 28-03-2022
Tactics

Mario Larkin
Posted on: 14-02-2022
GS-441524 for COVID19 not pursued by GILEAD

Florian Muller
Posted on: 30-05-2020
Mr

Raja
Posted on: 06-10-2017
Sr.

Julián Andrés Molina Menjura
Posted on: 12-09-2017

Add a call for help View more calls for help