The high cost of ﬁling for patents from three separate patent ofﬁces representing the world's three largest markets makes triadic patent families a more valid measure than simple patent counts for identifying economically valuable inventions.
The United States, Japan, Germany, France, and the United Kingdom were the top ﬁve ﬁlers of triadic patents in 2003, together accounting for 84% of the world's triadic patent families in 2003.
The United States had the largest increase in world share between 1993 and 2003, increasing from 34 to 37% of the total.
While their share of the world total remained small (less than half a percent each), China and India increased their ﬁlings of triadic patents from 33 to 225 and from 8 to 99, respectively, between 1993 and 2003.
Patent shares by technology provide a more nuanced comparison of inventive output between countries and over time.
discusses biotechnology and information and communications technology patenting trends.