WASHINGTON—The Justice Department is intensifying an investigation into whether tech giants including Apple Inc., Microsoft Corp. and Research in Motion Ltd. could use a recently acquired trove of patents to unfairly hobble competing smartphones using Google Inc.'s Android software, according to people familiar with the matter.
A consortium of six companies last month paid $4.5 billion to acquire a portfolio of 6,000 patents auctioned by the bankrupt Canadian telecom equipment maker Nortel Networks Corp., thwarting Google's interest.
The final amount, five times Google's original $900 million "stalking horse" bid, stunned observers and raised concerns about how the consortium intended to ...
