families SunPower 79 families Solar World 55 families Schott 46 families

Families sunpower 79 families solar world 55 families

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families), SunPower (79 families), Solar World (55 families), Schott (46 families), Evergreen Solar (31 families), First Solar (16), and Global Solar (3). In total, these companies own 608 solar energy patent families, containing a total of 321 U.S. patents, 204 EPO patents, and 172 patent applications filed with the WIPO. Again, using this set of companies is to better assess the influence of DOE’s earlier solar PV research specifically on later technology developments by the top U.S. solar PV producers. E.5.3 Identifying the Leading Companies in Solar Energy Patenting for Backward Tracing To identify more broadly the influence of DOE’s earlier solar PV research on later solar energy technology development, leading companies in solar energy patenting were identified and used in the second element of the backward tracing. To identify such companies, the study first defined the universe of solar energy patents using a modified version of the patent filter employed to identify the DOE-
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Appendix E – Bibliometric Methodology Used in the Solar PV Knowledge Benefits Chapter E-7 attributed candidate solar PV patents. The narrower filter was used because of practical considerations. In defining the DOE solar PV patent set, candidate patents were read individually to determine their relevance. This process was possible because the number of patents involved was relatively small. The same process of reading individual patents was not practical when the patent set is drawn from the entire universe of patents, not just those patents attributed to research funded by DOE. The patent filter used to define the universe of solar energy patents thus had to avoid introducing large numbers of irrelevant patents, since these patents could not be removed by reading them individually. The patent filter used for this process is described in detail in the source report (Ruegg and Thomas, in press). In total, using the patent filter, the study defined a solar energy universe containing 6,793 U.S. patents, 4,093 EPO patents, and 3,971 WIPO patents. These patents were grouped into 13,156 patent families. The study then identified the top 10 companies with the largest number of patent families in this set, including patents assigned to subsidiaries, acquisitions etc. These companies in declining order of their number of solar energy patents are Canon (455); BP Solar—also included in the list of the top U.S. solar PV producers (213); Sanyo (202); Sharp (199); Energy Conversion Devices—also included in the list of the top U.S. solar PV producers (166); Siemens (137); General Electric (129); Boeing (128); ExxonMobil (95); and Mitsubishi Electric (88). In total, these companies are responsible for 1,812 solar energy patent families, containing a total of 1,105 U.S. patents, 642 EPO patents, and 273 WIPO patents. These 1,812 solar energy patent families owned by these leading companies in solar energy patenting form the starting point for the second element of the backward tracing analysis. This element of the backward tracing is to assess the influence of DOE’s solar
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  • Spring '18
  • Professor Obura Oluoch
  • Photovoltaics, Solar cell

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