1
Guo Feng Xu: Biological wound dressing and method of making. Grandhope Biotech, Raymond Sun, October 26, 2010: US07820871 (5 worldwide citation)

A biological wound dressing is made by a method that includes the steps of providing a natural animal tissue that has a substrate, crosslinking and fixing the substrate, minimizing the antigens from the substrate, and incorporating an active layer in the substrate.


2
Xu Guofeng: Biological wound dressing and method of making. Summit Gd Biotech, October 15, 2008: EP1979010-A1

A biological wound dressing is made by a method that includes the steps of providing a natural animal tissue that has a substrate, crosslinking and fixing the substrate, minimizing the antigens from the substrate, and incorporating an active layer in the substrate.


3
Guo Feng Xu: Biological wound dressing and method of making. Raymond Sun, June 21, 2007: US20070142763-A1

A biological wound dressing is made by a method that includes the steps of providing a natural animal tissue that has a substrate, crosslinking and fixing the substrate, minimizing the antigens from the substrate, and incorporating an active layer in the substrate.


4
Xu Guofeng: Biological wound dressing and method of making. Summit, Xu Guofeng, ADVANCE CHINA IP LAW OFFICE, June 28, 2007: WO/2007/071168

A biological wound dressing is made by a method that includes the steps of providing a natural animal tissue that has a substrate (1), crosslinking and fixing the substrate (1), minimizing the antigens from the substrate (1), and incorporating an active layer (2) in the substrate (1).