Patents. Amendments to patent laws, hearings, 76th Congress, 3d session, on H. R. 8441, to afford greater protection to purchaser of patent rights, H. R. 8442 (and substitute H. R. 9616), to prohibit proof of acts done by inventor in foreign countries, H. R. 8444, to permit assignee of application for letters patent to make certain supplemental applications, H. R. 9384, to simplify practice in cases where patent is or may be in part valid and in part invalid, H. R. 9386, to improve practice concerning applications for patents made by plural applicants and patents issued thereon, to provide for applications in certain circumstances by assignees of inventors, and to simplify formal application papers, H. R. 9388, to protect inventors whose first application for patent was filed in foreign country from undue limitations of their rights to obtain United States patents, May 9 and 16, 1940.

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