Please also note that Howard Hughes Sr. patents do not apply to Manchukuo as it never signed the Paris Convention of 1883 or the subsequent treaties regarding patents. And China as a whole only signed in 1984 where as for Japan it is specifically noted that Japan's territory includes Korea, Taiwan and South Sakhalin, but no mention of Manchuria.
And even under the Paris convention you need to file your patent with each country. The P.C. just makes it possible for foreigners to file.
So Japanese companies or at least their Manchurian subsidiaries could use Howard's drill bits without direct legal consequences.
And even under the Paris convention you need to file your patent with each country. The P.C. just makes it possible for foreigners to file.
So Japanese companies or at least their Manchurian subsidiaries could use Howard's drill bits without direct legal consequences.