Media type: E-Article Title: Patent Height and Competition in Product Improvements Contributor: van Dijk, Theon imprint: JSTOR, 1996 Published in: The Journal of Industrial Economics Language: Not determined DOI: 10.2307/2950643 ISSN: 0022-1821 Keywords: Economics and Econometrics ; General Business, Management and Accounting ; Accounting Origination: Footnote: