Hamman geographic code system, hearings, 70th Congress, 1st session, pursuant to public resolution 70, 69th Congress, authorizing joint committee of both Houses to consider purchase of right to unrestricted use of Harriman geographic code system under patents issued, or that may be issued, and also unrestricted use of all copyrights issued, or that may be issued, in connection with products of Harriman geographic code system for all governmental, administrative, or publication purposes for which same may be desirable, Feb. 7-Mar. 2, 1928.

Tools