Distribution of patents issued to cooperations :
Distribution of patents issued to cooperations : 1939 - 1955
- V, 34 S.
- Study of the subcommittee on patents 3 .
- Study of the subcommittee on patents, trademarks, and copyrights of the committee on the judiciary, United States Senate 3 .
USA
Patentwesen
USA
Patentwesen