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. 2008 Nov;2(6):971–976. doi: 10.1177/193229680800200607

Figure 2.

Figure 2.

Number of U.S. Patents filed per year related to closed-loop glucose control systems obtained by searching for the terms “closed loop”, “glucose control,” “artificial pancreas,” and “diabetes” combined with the most relevant IPC classes (A61M, A61B, and G01N). Similar terms were considered (e.g., “close” instead of “closed”, or “analyte” instead of “glucose”).