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Journal of Nanoparticle Research
Erschienen in: Journal of Nanoparticle Research 12/2015

01.12.2015 | Perspectives

Nano/micro-electro mechanical systems: a patent view

verfasst von: Guangyuan Hu, Weishu Liu

Erschienen in: Journal of Nanoparticle Research | Ausgabe 12/2015

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Abstract

Combining both bibliometrics and citation network analysis, this research evaluates the global development of micro-electro mechanical systems (MEMS) research based on the Derwent Innovations Index database. We found that worldwide, the growth trajectory of MEMS patents demonstrates an approximate S shape, with United States, Japan, China, and Korea leading the global MEMS race. Evidenced by Derwent class codes, the technology structure of global MEMS patents remains steady over time. Yet there does exist a national competitiveness component among the top country players. The latecomer China has become the second most prolific country filing MEMS patents, but its patent quality still lags behind the global average.
Nächster Artikel Electro-oxidation of methanol in alkaline conditions using Pd–Ni nanoparticles prepared from organometallic precursors and supported on carbon vulcan

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Fußnoten
2
Please note the raw records extracted from DII are patent family, i.e., a group of related inventions on the same technical subject filed in different countries (Martínez 2010; Grupp and Mogee 2004). Globally it is becoming increasingly common for a single invention to be filed with multiple patent authorities for which legal protection is sought.
 
3
The patent data indexed in DII for 2013 are incomplete due to collection lag; thus, we see a bit of a downward slope for that year.
 
4
Triad patents refer to a set of patent applications related to the same invention filed at the three traditionally most prestigious patenting offices: JPO, EPO, and USPTO.
 
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Metadaten
Titel
Nano/micro-electro mechanical systems: a patent view
verfasst von
Guangyuan Hu
Weishu Liu
Publikationsdatum
01.12.2015
Verlag
Springer Netherlands
Erschienen in
Journal of Nanoparticle Research / Ausgabe 12/2015
Print ISSN: 1388-0764
Elektronische ISSN: 1572-896X
DOI
https://doi.org/10.1007/s11051-015-3273-1

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