At that time she helped popularize and held the patent to the flat bottom wok with a handle , also known as a stir fry pan , and sold polyethylene cutting boards ( Sumitomo Bakelite ) .
In 1971 , Joyce Chen launched a line of Chinese cooking utensils .
At that time Joyce Chen helped popularize and held the patent to the flat bottom wok with a handle , also known as a stir fry pan , and sold polyethylene cutting boards ( Sumitomo Bakelite ) .
In 1971 , Joyce Chen launched a line of Chinese cooking utensils .