As Wikipedia and OECD say, Triadic patents are a series of corresponding patents filed at the European Patent Office (EPO), the United States Patent and Trademark Office (USPTO) and the Japan Patent Office (JPO), for the same invention, by the same applicant or inventor. Triadic patents form a special type of patent family.
That indicator is developed using the databases of the U.S., European and Japanese patent offices with a view to listing the inventions that are protected on all three markets. Given the high costs of filing for a patent in three separate offices, triadic patents are usually filed for more economically valuable inventions.
More about triadic methodology @this link (a paper from Helene Dernis and M Khan)
More recently also 4 and 5 offices, adding Korea and China, families have been introduced; this is another interesting list of statistic for triadics but also 4 and 5 offices patents:
http://www.trilateral.net/statistics/tsr.html c (triadics and 4 offices)
http://www.trilateral.net/statistics/grants.html (grants by ipc for 5 offices)
That indicator is developed using the databases of the U.S., European and Japanese patent offices with a view to listing the inventions that are protected on all three markets. Given the high costs of filing for a patent in three separate offices, triadic patents are usually filed for more economically valuable inventions.
More about triadic methodology @this link (a paper from Helene Dernis and M Khan)
More recently also 4 and 5 offices, adding Korea and China, families have been introduced; this is another interesting list of statistic for triadics but also 4 and 5 offices patents:
http://www.trilateral.net/statistics/tsr.html c (triadics and 4 offices)
http://www.trilateral.net/statistics/grants.html (grants by ipc for 5 offices)
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