Toshiba-Kongsberg machine tool diversion (1987)
Toshiba Machine and Norway's Kongsberg sold advanced milling machines to the Soviet Union that could cut submarine propellers quietly, violating Cold War export rules. The diversion ran through intermediaries and falsified end-user certificates.
The US imposed sanctions on Toshiba, and Japan tightened export controls.
The case became the template for end-user verification and third-party liability in export-control enforcement.
The Northwestern Polytechnical purchases show the same pattern: restricted technology reaching a barred end-user through a domestic intermediary rather than the manufacturer.
