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Erscheinungsjahr: 
2019
Schriftenreihe/Nr.: 
CESifo Working Paper No. 7599
Verlag: 
Center for Economic Studies and ifo Institute (CESifo), Munich
Zusammenfassung: 
We study the causal impact of invalidating marginally valid patents during post-grant opposition at the European Patent Office on affected inventors’ subsequent patenting. We exploit exogenous variation in invalidation by leveraging the participation of a patent’s original examiner in the opposition division as an instrument. We find a disciplinary effect of invalidation: Affected inventors file 20% fewer patent applications in the decade after the decision. This effect is entirely driven by a reduction in low-quality filings, i.e., filings that examiners associate with prior art that threatens the application’s novelty or inventive step. We do not observe shifts into national patenting.
Schlagwörter: 
inventors
marginal patents
patent invalidation
patent opposition
post-grant review
EPO
innovation
JEL: 
O31
O34
Dokumentart: 
Working Paper
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