In the days when paunchy Thurman Arnold breezily fired anti-trust suits, like howitzer shells, at U.S. corporations, he reserved a supporting machine-gun drumfire for corporate patent practices. His tracers indicated that many a U.S. corporation used patents to restrain trade, i.e., by mass research to make minor patentable improvements, thereby extending original patents far beyond their 17-year limits. Before Arnold could bring his heavy guns to bear, he was upped to the U.S. Court of Appeals. Many a U.S. businessman relaxed. But from his new vantage point, Justice Arnold last week...
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