Packalen and Bhattacharya indexed every one-word, two-word, and three-word
phrase that appeared in more than 4 million patent texts in the last 175
years. To focus their search on truly new concepts, they recorded the year
those phrases first appeared in a patent. Finally, they ranked each
concept's popularity based on how many times it reappeared in later
patents. Essentially, they trawled the billion-word literature of patents
to document the birth-year and the lifespan of American concepts, from
"plastic" to "world wide web" and "instant messaging."

http://theatln.tc/1DgCAdL
http://theatln.tc/1DgCAdL+

-- 
Peterk
Dallas, Tx
Save our in-boxes! http://emailcharter.org
"The problems of our economy have occurred not as an outgrowth of
laissez-faire, unbridled competition.
They have occurred under the guidance of federal agencies, and under the
umbrella of federal regulations."
Senator Ted Kennedy, in defending trucking deregulation in 1978.

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