Gao Haiyan authorized patent

1. A double-tube quantitative temperature control hair dyeing comb. , Hou,.

2. A hair dyeing comb capable of dyeing various colors. , Hou,.

3. A natural hair dye made of plant pigment catechu and its dyeing method. Hou, Liu Qiguo. Authorized patent number:101164528b.

4. Preparation method and application of photo-immobilized horseradish peroxidase electrode. Joey, Xu, etc. Authorized patent number:101140256b.

5. A method for recovering spent cobalt-containing catalyst from Fischer-Tropsch synthesis. Xiang Hongwei, Li. Authorized patent number: 02 130057.7.

6. Separation method of cobalt and zirconium from spent catalyst. Xiang Hongwei, Li. Authorized patent number: 02 130066.6.