## 5 Evaluation of the Technological Innovation of the Invention
\begin{table}
\begin{tabular}{p{56.9 pt} p{113.8 pt} p{113.8 pt}} \hline
**Country/Region** & **Document Number** & **Title** \\ \hline
**Canada** & CA2999152A1 & Device for recording video electroencephalograms \\ \hline
**Canada** & CA3092670A1 & Dynamic quantitative brain activity data collection devices, systems, and methods \\ \hline
**China** & CN115281693A & Internet-based electroencephalogram information extracting and monitoring device for pediatric neurology examination \\ \hline
**China** & CN215937398U & Adjustable electroencephalogram electrode fixing frame \\ \hline
**China** & CN216495336U & Wearable electroencephalogram detection device \\ \hline
**China** & CN216962474U & Simple and convenient electroencephalogram monitoring device \\ \hline
**China** & CN220275615U & Wearable electroencephalogram signal acquisition device \\ \hline
**China** & CN220404015U & Electroencephalogram head ring \\ \hline
**U.S.A.** & US3490439 & Electrode holder for use with an electroencephalograph \\ \hline
**U.S.A.** & US3998213 & Self-adjustable holder for automatically positioning electroencephalographic electrodes \\ \hline
**U.S.A.** & US7551952 & EEG electrode headset \\ \hline
**U.S.A.** & US8326396 & Dry electrode for detecting EEG signals and attaching device for holding the dry electrode \\ \hline
**U.S.A.** & US11701056B2 & EEG measuring device \\ \hline
**U.S.A.** & US2020/178833A1 & Method and system for measuring electrophysiological signals with real-time adjustment of size, electrode positioning, and spatial resolution of a headset \\ \hline
**WIPO** & WO2014/141213A1 & Headset for treatment and assessment of medical conditions \\ \hline
**WIPO** & WO2017/083826A1 & EEG headsets with precise and consistent electrode positioning \\ \hline
**WIPO** & WO2022/268299A1 & Size-adjustable EEG headset \\ \hline
**WIPO** & WO2024/026392A2 & Systems including wearable electroencephalography devices with movable band(s) and methods of use thereof \\ \hline \end{tabular}
\end{table} 
Table 7: Results of the technological background search in patent databases. \begin{table}
\begin{tabular}{p{56.9 pt} p{113.8 pt} p{113.8 pt}} \hline
**Country/Region** & **Document Type** & **Ref.** & **Title** \\ \hline
**U.S.A.** & Scientific Article & [41] & Real-time neuroimaging and cognitive monitoring using wearable EEG \\ \hline
**U.S.A.** & Scientific Article & [42] & Design and validation of a low-cost mobile EEG-based brain–computer interface \\ \hline \end{tabular}
\end{table} 
Table 8: Summary of relevant scientific articles and documents. The search of technological background within the databases referenced in this report identified a total of eighteen patent documents, two scientific articles, and four commercial developments, all possessing technical characteristics comparable to the invention under consideration. The analysis of the detected documents reveals that the state of the art includes various device configurations for measuring brain activity using electroencephalography (EEG) electrodes placed at strategic points on the head. Some inventions incorporate electrodes mounted on a flexible chassis made of straps, bands, or belts, allowing them to be adjusted to skulls of different sizes. Others, on the other hand, use a semi-rigid structure with flexible elements that facilitate adaptation to the user's morphology. Some devices incorporate mechanisms to adjust the position of the electrodes, allowing precise contact with the required points on the head. One of the most common solutions involves mounting the electrodes on movable bodies that slide along the bands or straps. These movable bodies not only enable lateral adjustment but also include means to regulate the depth of the electrodes, ensuring proper contact for measurement. Other configurations position the electrodes at the ends of flexible elements, facilitating their placement without mechanical or spatial restrictions.