TY  - BOOK
AU  - Hopenhayn,Hugo A.
AU  - Mitchell,Matthew F.
TI  - Innovation fertility and patent design
AV  - KF3142 .A1 H663I
PY  - 1999///
CY  - Cambridge, Mass.
PB  - National Bureau of Economic Research
KW  - PATENT LAW AND LEGISLATION
KW  - ECONOMIC ASPECTS
KW  - UNITED STATES
KW  - MATHEMATICAL MODELS
KW  - TECHNOLOGICAL INNOVATIONS
KW  - MODELS (PATENTS)
ER  -