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| Tekijä: | MacLeod, C. (et al.) |
| Otsikko: | Evaluating inventive activity: the cost of nineteenth-century UK patents and the fallibility of renewal data |
| Lehti: | Economic History Review
2003 : AUG, VOL. 56:3, p. 537-562 |
| Asiasana: | Inventions Patents United Kingdom |
| Kieli: | eng |
| Tiivistelmä: | The authors argue that the renewal data severely underestimate the quality of late ninteenth-century UK patents, and they go on to suggest that, ironically, the fine mesh of the renewal filter was not entirely proof against the persistence of technically unviable and low value inventions. From a case study of patenting in the steam-engineering industry it is established that, despite the high fees, patents for technically impossible inventions might be renewed once or even twice, to be kept in force for the full term. |
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