Patents by Inventor Yang-Hwi Cho

Yang-Hwi Cho 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).

Extension for cone-shaped traffic marker

Patent number: D266653

Type: Grant

Filed: January 25, 1980

Date of Patent: October 26, 1982

Assignee: Park & Willow Crafts Corp.

Inventor: Yang-Hwi Cho

Extension for cone-shaped traffic marker