FYI, it was John Walker who sold the submarine secrets.
Toshiba sold dual use machine tools necessary for the propeller blades.
I think the machine tools were on the prohibited not for sale list, but then without the knowledge that John Walker provided, these tools were useless.
The tools weren’t “useless”. They were needed to create the final product, OR to do the R&D to fill in the blanks of whatever the commies didn’t know yet. That’s why there were laws in place that Toshiba knowingly broke, and it was an act of treason for them to do so, Walker or no Walker.