A brief history of space and time : the scope-year index as a patent value indicator based on families and renewals /
Pottelsberghe de la Potterie, Bruno van.
Zeebroeck, Nicolas van.
Centre for Economic Policy Research (Great Britain)
London : Centre for Economic Policy Research,
2007.
Caption title.
"Industrial organization."
Includes bibliographical references.
European Patent Office.
Patent extensions
Also issued online.