Invisible Agent

Invisible Agent is a 1942 American science fiction film from Universal. The film was a wartime propaganda production that was part of a Hollywood effort to boost morale at the home front. It loosely echoed a series of formula warhorror films produced during this period that typically featured a mad scientist working in secret to aid the Third Reich.

The grandson of Dr. Jack Griffin, the original invisible man, has emigrated to the United States and now runs a print shop in Manhattan under the assumed name of Frank Raymond Jon Hall. In his shop he is confronted by four armed men who reveal that they know his true identity. One of the men, Conrad Stauffer Cedric Hardwicke, is a lieutenant general of the S.S., while a second, Baron Ikito Peter Lorre, is Japanese. They offer to pay for the invisibility formula and threaten amputation if it is not revealed. Griffin manages to escape with the formula in his hands.Griffin is reluctant to release the formula to the U.S. government officials and only agrees to limited cooperation following the bombing of Pearl Harbor. The condition is that the formula can only be used on himself. Later, while inflight to be parachuted behind German lines on a secret mission, he injects himself with the invisibility serum. Griffin strips out of his clothing as he parachutes down, much to the shock of German troops tracking his descent. ........

Source: Wikipedia