US Patent Issued to Shengzhou Greatt Electronics on May 6 for "Surface treatment technology of magnetic circuit of loudspeaker" (Chinese Inventor)

ALEXANDRIA, Va., June 10 -- United States Patent no. 12,294,838, issued on May 6, was assigned to Shengzhou Greatt Electronics Co. Ltd. (Shaoxing, China).

"Surface treatment technology of magnetic circuit of loudspeaker" was invented by Shanjun Ding (Shaoxing, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A surface treatment method of magnetic circuit of loudspeaker includes: S1, assembling components of the magnetic circuit; S2, painting treatment; S3, assembling the loudspeaker; and S4, testing and packaging. In the S1, a T yoke and a magnet are cleaned with a detergent to ensure that adhered surfaces do not remain any pollutants, and surfaces of the T yoke and the magnet are mechanically treated by...