Florida State University Research Foundation leads the applicant ranking with 7 patent families, followed by General Capacitor LLC with 5 and SPEL Technologies with 4. The top five filers collectively are visible in the field, accounting for 80% of the ranked applicants visible in this query’ combined total — a level of concentration more typical of early-stage or niche technology areas.

The tier gap between the leader and the rest is pronounced: the top three applicants hold the overwhelming majority of activity, while six additional applicants each hold only a single patent family. This steep drop-off indicates limited mid-tier competition and suggests that a small number of organizations have shaped most of the technical agenda.

The presence of universities and research foundations (Florida State, Penn State, Harbin University of Science and Technology, Tianjin University) as core filers — alongside specialist firms — implies that much of the foundational IP originates from academic labs, which may create licensing opportunities but also means commercial manufacturing know-how remains relatively under-protected.

Filings from the most recent 18–24 months are subject to publication lag and will likely appear higher once records are fully published; interpret the recent-period counts as minimums rather than final figures. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.