One assignee leads the ranked field with 38 records, well ahead of the fifth-ranked company at 14 and the tenth-ranked company at 4, across the 17 companies the dataset’s assignee ranking covers. This is a concentrated-at-the-top pattern rather than an even spread, meaning a small number of established Swiss manufacturing and research groups hold most of the documented claim space. Anyone assessing freedom to operate should start with the leading assignee’s portfolio before looking at the long tail of smaller filers.

Filing peaked at 20 records in 2017 and has since settled into a low, flat pattern, with the tracked 2021-to-2024 window showing 0% change (2 filings at both ends). Figures for 2025 and 2026 look lower still, but publication typically lags filing by around 18 months, so those years are not yet complete and should not be read as a further decline. The honest summary is plateau, not growth and not collapse.

A silicon escape wheel replaces the traditional metal escape wheel with a component fabricated using semiconductor-style processes, including reactive ion etching, aimed at eliminating lubrication and improving amplitude stability. In this dataset it sits within the smaller B81C (MEMS manufacturing) classification, well under 5% of the 165 records, indicating it is a modern refinement layered onto a much larger base of classical mechanical filings rather than a mainstream claim category on its own.