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This paper investigates the presence of General Purpose Technologies (GPTs) in US patent data, analyzing three million patents granted from 1967 to 1999 and their citations. The authors develop measures to identify GPTs, focusing on highly cited patents, particularly in the ICT sector, and highlight the challenges faced in quantifying these technologies. The study emphasizes the importance of understanding patent citations as indicators of technological significance and diffusion across industries.

Author

Tushar Mehra

Language

EN