TY  - BOOK
TI  - The story of the United States Patent Office 1790-1956
PY  - 1956///
CY  - Washington: 
PB  - Gov. Print. Off., 
KW  - USA
KW  - Patentamt
KW  - Patentwesen
KW  - Geschichte
N1  - 12.513, 12.749
ER  -