TY  - GEN
T1  - Post-issue patent 'quality control' :a comparative study of US patent re-examinations and european patent oppositions /
AU  - Graham, Stuart J. H.,
AU  - Hall, Bronwyn H.
AU  - Harhoff, Dietma.
AU  - Mowery, David C.
ET  - 8807.
N1  - National Bureau of Economic Research (NBER) Working Paper 8807, February 2002.
ID  - 13398
KW  - Patents
KW  - PATENT EXAMINATION SYSTEM
KW  - PATENT PROCEDURES
KW  - EUROPEAN PATENT SYSTEM
KW  - PATENT RE-EXAMINATION : UNITED STATES
TI  - Post-issue patent 'quality control' :a comparative study of US patent re-examinations and european patent oppositions /
ER  -