The U.S. Supreme Court struggled over whether to upend nearly 30 years of law governing patent lawsuits that critics say allows often-baseless litigants to sue in friendly courts, giving them the upper hand over high-technology companies such as Apple Inc. and Alphabet Inc.'s Google. The justices heard an hour of arguments in an appeal by beverage flavoring company TC Heartland LLC to have a patent infringement suit brought against it by food and beverage company Kraft Heinz Co. moved from federal court in Delaware, where it was filed, to Heartland's home base in Indiana.
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