NDLI: Technological collaboration patterns in solar cell industry based on patent inventors and assignees analysis

Content Provider	Springer Nature Link
Author	Lei, Xiao Ping Zhao, Zhi Yun Zhang, Xu Chen, Dar Zen Huang, Mu Hsuan Zheng, Jia Liu, Run Sheng Zhang, Jing Zhao, Yun Hua
Copyright Year	2012
Abstract	This study examines technological collaboration in the solar cell industry using the information of patent assignees and inventors as defined by the United States Patent and Trademark Office. Three different collaborative types, namely local (same city), domestic (different cities of the same country), and international collaboration, are discussed. The general status of solar cell patent collaborations, transforming trends of collaborative patterns, average numbers of assignees and inventors for three collaborative types, and international collaboration countries are studied. It is found that co-invented patents and co-assigned patents have both increased in numbers during the four decades studied, and that collaboration between technology owners is very low while the collaboration between inventors is active. Domestic collaboration is the main collaborative pattern for both assignee collaboration and inventor collaboration. The other two collaborative types show contrary trends: international collaboration has slowly risen in the past decades while local collaboration has dwindled. The US has the largest number of internationally collaborative patents worldwide, though such patents account for a low portion of total US patents. In contrast, China has a small total number of patents and internationally collaborative patents, however its international collaborative shares are higher. The international collaboration patents among countries are few. A co-assigned patent analysis indicates that the main international cooperation partner of the United States is Japan. Based on an international co-invented patent analysis, the main international collaboration partners of the United States are Britain, Japan, and Germany; and the United States is also the most important collaboration partner of China.
Starting Page	427
Ending Page	441
Page Count	15
File Format	PDF
ISSN	01389130
Journal	Scientometrics
Volume Number	96
Issue Number	2
e-ISSN	15882861
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-01-03
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Patent analysis Collaboration Inventor Assignee Solar cell PV system Information Storage and Retrieval Library Science Interdisciplinary Studies
Content Type	Text
Resource Type	Article
Subject	Library and Information Sciences Computer Science Applications

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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