Patents by Inventor Yen-Shen Jen

Yen-Shen Jen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

Engraver for finger ring and bracelet

Patent number: D291811

Type: Grant

Filed: August 9, 1985

Date of Patent: September 8, 1987

Inventor: Yen-Shen Jen

Engraver for finger ring and bracelet