Abstract
Using the entire population of USPTO patent applications published between 2002 and 2019, and leveraging on both patent classification and semantic analysis, this paper aims to map the current knowledge base centred on robotics and AI technologies. These technologies are investigated both as a whole and distinguishing core and related innovations, along a 4-level core-periphery architecture. Merging patent applications with the Orbis IP firm-level database allows us to put forward a twofold analysis based on industry of activity and geographic location. In a nutshell, results show that: (i) rather than representing a technological revolution, the new knowledge base is strictly linked to the previous technological paradigm; (ii) the new knowledge base is characterised by a considerable—but not impressively widespread—degree of pervasiveness; (iii) robotics and AI are strictly related, converging (particularly among the related technologies and in more recent times) and jointly shaping a new knowledge base that should be considered as a whole, rather than consisting of two separate GPTs; (iv) the US technological leadership turns out to be confirmed (although declining in relative terms in favour of Asian countries such as South Korea, China and, more recently, India).
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Notes
See also Staccioli and Virgillito (2021) for a recent analysis of long waves in labour-saving automation technologies.
The reader may also think of the convergence of microelectronics, TLC, and software, as a specific feature of the ICT revolution (see Mowery and Rosenberg, 1998).
Paraphrasing David and Wright (1999), the question can be also asked as follows: does robotics stand to AI as the electric dynamo stands to electrification? In fact, as already mentioned in Sect. 2 above, for David and Wright (1999) the dynamo represented an “enabling technology” in the sense of Bresnahan and Trajtenberg (1995, p. 84), namely a new device “opening up new opportunities rather than offering complete, final solutions.”.
Available at https://bulkdata.uspto.gov/.
It is worth noting that CPC codes within the Y10S class are of a special kind compared to other CPC codes, as they do not define additional technological categories. Instead, they are occasionally used, besides normal CPC classification codes, to collect patent documents that cut across class or subclass lines. We include codes Y10S901 and Y10S706 in the search as a refinement to the mentioned concordance tables, since they directly target our USPC classes of interest.
Since applications published before the introduction of the CPC scheme (1st January 2013) can not display the assigned CPC codes, we use the CPC Master Classification File (MCF) for US Patent Applications, also retrievable from the USPTO Bulk Data Storage System, which attributes relevant CPC codes to older applications.
Since the selection of KW AI patents depends on a multiplicity of keywords, we are implicitly assuming a constant and unitary rate of substitution between an additional occurrence of a keyword already mentioned, and the occurrence of a previously unmentioned keyword.
See the specification at https://www.census.gov/eos/www/naics/.
This result matches our expectations since code 541 includes software.
As can be seen in Table 9 reported in Appendix 1, all the obtained cross-level similarity coefficients are systematically lower for robotics technologies, corroborating their more pervasive nature.
Note that relying on the application date shifts our investigation period backwards by one year. The first period comprises 7 full years, while the subsequent ones only 6; in this way, the global financial crisis only affects the second sub-period.
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Funding was supported by Ministero dell’Istruzione, dell’Università e della Ricerca (Grant No. 201799ZJSN).
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Appendices
Appendix 1
In this technical appendix we formally define the two proximity measures, namely cosine similarity and Spearman rank correlation, used in the construction of Table 8 and discussed in Sect. 4.3. As extensions to the underlying core-periphery levels are straightforward, we only explain their development in the overall case.
Once a group of patents are matched to their corporate assignee(s) (cf. Sect. 3.3), it is possible to build a rank of their corresponding sectoral industries, sorted by frequency of occurrence. Provided that there exist 99 NAICS codes at the 3-digit level, the ranking can be expressed as a vector in the 99-dimensional vector space of natural numbers. Given two such vectors \({\rm X},{\rm Y}\in {\mathbb{N}}^{99}\) corresponding to, say, the whole sets of robotics and AI patents, respectively (or any of their core-periphery subsets), it is possible to define their cosine similarity as the cosine of the angle between them, which is also equal to the inner product of the same vectors normalised to unit length. Formally,
where \({x}_{i}\) and \({y}_{i}\) denote the components of vectors \(X\) and \(Y\), respectively, and \(||\cdot ||\) denotes the Euclidean norm. Since rank vectors are non-negative, values of their cosine similarity are bound to the unit interval \(\left[{0,1}\right]\).
In a similar fashion, it is possible to define the Spearman rank correlation as the usual Pearson correlation coefficient between the rank vectors \(X\) and \(Y\). Formally,
Once these similarity measures are defined, it is possible to check whether the core-periphery architecture devised in Sect. 3.2 displays a satisfactory degree of inner consistency. Ideally, given the defined hierarchy, adjacent levels should bear more mutual similarity than non-adjacent ones. Accordingly, level CP1 should be closer to level CP2 than to level CP3, and closer to level CP3 than to level CP4, and level CP2 should be closer to CP3 than to CP4. Table 9 reports the cross-level proximity measures, both in terms of cosine similarity and Spearman correlation, for both robotics and AI patents, corroborating our core-periphery structure by validating the aforementioned requirement.
Appendix 2
See Tables 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, and 22.
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Santarelli, E., Staccioli, J. & Vivarelli, M. Automation and related technologies: a mapping of the new knowledge base. J Technol Transf 48, 779–813 (2023). https://doi.org/10.1007/s10961-021-09914-w
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DOI: https://doi.org/10.1007/s10961-021-09914-w
Keywords
- Robotics
- Artificial intelligence
- General purpose technology
- Technological paradigm
- Industry 4.0
- Patents full-text