ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,481,248, issued on Nov. 25, was assigned to NIVAROX-FAR S.A. (Le Locle, Switzerland).
"Method for manufacturing horological balance springs" was invented by Geoffrey Chassin (Morteau, France) and Pierre Cusin (Villars-Burquin, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided a method for manufacturing a batch of horological balance springs (2a), the average of whose stiffnesses lies within a predetermined range, and the method includes forming in a wafer the horological balance springs (2b, 2c) with dimensions that differ from the dimensions required to obtain the batch of horological balance springs (2a), the average of whos...