Objection your honor, speculation.
This is a report by the issued by the US Patent Office on prolific inventors for the period 1988 to 1997. The country of residence of the inventor is shown. Also shown is the corporation which received an assignment of the patent. Lots and lots of German and Japanese companies are getting US patents and assigning those patents to large biotech corporations. In fact, more than half of these "prolific inventors" are resident somewhere outside the US.
http://www.uspto.gov/web/offices/ac/ido/oeip/taf/inv_prol.pdf
What is your point about inventors and residency? Also, I don't see the connection you are making between "prolific inventors" and the time period 1988 to 1997. Inventions, not inventors, are granted protection from various organizations that govern different geographical regions when a patent issues; the USPTO is only one of many such organizations. So your comment about prolific inventors living outside the US is nonsensical.