The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 2021
Filed:
Aug. 27, 2018
The Swatch Group Research and Development Ltd, Marin, CH;
Alexandre Haemmerli, Neuchatel, CH;
Francois Gueissaz, Cormondreche, CH;
Lionel Tombez, Bevaix, CH;
Bernhard Schnyder, Leuzigen, CH;
Silvio Dalla Piazza, St-Imier, CH;
The Swatch Group Research and Development Ltd, Marin, CH;
Abstract
A piezoelectric element for an automatic frequency control circuit. The element includes a balance spring formed of a piezoelectric crystal strip, a first electrode connected to the automatic control circuit, and disposed on at least a first side of the strip, and a second electrode connected to the automatic control circuit and disposed on at least a second side of the strip. The first and second electrodes are placed on one portion or over the entire length of the balance spring in a predetermined angular distribution.