Patent linkages allow the
connection of marketing approvals (MA) for generic
pharma products to the patents covering an innovator company’s
original/reference drug. Their purpose is to ensure that MAs are not given to
patented products; and to allow generic makers to plan their launches without
infringement risk, and also to invalidate weak patents. It also allows the innovator company to take action for
infringement of relevant patent(s) to prevent MAs issuing to generic products too.
In some countries, innovator company must list relevant patents so a generic
company knows which patents cover the original/reference drug. Encouragement
for generic pharma companies to seek MAs is sometimes provided by giving a
period of market exclusivity to a generic company who invalidates a blocking
patent.
In SE
Asia only Singapore has a patent linkage system in place now. For the MA, the generic applicant must
file a declaration stating whether its product
infringes any relevant patents. This
is a self declaration system, whereby it is up to the applicant to ensure there is no infringement. The generic applicant may also be required to notify the
patentee of its MA application. The innovator company is entitled to take
action for infringement, which stops the MA process until the patent issues
have been decided.
Under
the CPTPP treaty Malaysia and Vietnam will have to implement a patent linkage
system, and possibly Singapore may amend theirs. The CPTPP requires
for the MA, prior notice to the patent holder and a period for the patent
holder to take legal action if needed. Unsurprisingly given the CPTPP's roots, this is a system based on the US one, which in essence allows the
patent owner to intervene to prevent the MA
issuing, and avoids the risk of infringing
products getting to market (and leading to expensive litigation). The CPTPP however also allows alternative systems that make the MA dependent on non- infringement (Singapore's current approach).
Vietnam’s
Ministry of Science and Technology is circulating a draft outline of the
amendments to their IP Law. The draft outline mentions a new Article on patent
linkage. However the specific provisions have not yet been drafted.
The discrepancy in the approaches reflects a worldwide debate on the scope of patent linkages. Should they be preventative like the US or informational like Singapore. The EU has no patent linkage rules and only some
national laws require an informational type approach to MAs.
The other major
regional IP treaty in Asia is the RCEP which is driven by China. That has no patent
linkage provisions in the IP chapter. All ASEAN countries are planning to
join this. It will be interesting to see how 3 of the 10 ASEAN countries fare
with patent linkages while the other 7 do not have them.
