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The drug was Biozole, an anti-fungal treatment whose patent is owned by pharmaceuticals giant Pfizer.
These include its version of Diovan, a successful treatment for high blood pressure whose patent, owned by Novartis of Switzerland, expired last year.
The most notorious example is Columbia University, which tested the boundaries of the law by seeking to re-patent a technique whose patent had already expired.
AbbVie obtains over half its revenues from one rheumatoid athritis treatment, Humira, which is the world's top selling drug but whose patent runs out in 2016.
Mylan is exclusively selling a related drug, a combination of Diovan and a diuretic, whose patent protection also expired in September.
A patent holder whose patent covers a technology that was in fact obvious to the world has a strong incentive to sit quietly after the patent is issued.
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The first is that of non-patentable compounds and drugs whose patents have expired.
Hirst is the current market king, an artist whose patented brand few ambitious collectors can do without.
THIS is a golden age for makers of cheap copies of bestselling medicines whose patents have expired.
All around the world, health-care providers are keen on buying cheaper generic copies of branded drugs whose patents have expired.
A Conservative health minister has deliberately blocked a new law to provide cheap and effective drugs for the NHS by championing medicines whose patents have expired.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com