The Clean Energy Patent Growth Index (CEPGI), published quarterly by the Cleantech Group at Heslin Rothenberg Farley & Mesiti P.C., provides an indication of the innovative trends in the clean energy sector from 2002 to the present.
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| (Courtesy CEPGI) |
The granting of patents by the United States Patent and Trademark Office (PTO) is often cited as a measure of the inventive activity and evidence of the effectiveness of research & development (R&D) investments.
Geothermal patents were down one compared to the first quarter but up five versus a year ago. Over the last decade the geothermal industry seems to be on an upswing in R&D investment.
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