GZ

Guohua Zhang

OE Otis Elevator: 1 patents #29 of 132Top 25%
📍 Yantai, NJ: #1 of 2 inventorsTop 50%
Overall (2016): #140,548 of 481,213Top 30%
2
Patents 2016

Issued Patents 2016

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
9518038 Condensation product of theanine derivative and carboxylic acid coumarin derivative, its intermediate, preparation method and use thereof Guoying Zhang, Ying Zhang, Benhao Wu 2016-12-13
9487378 Machine roomless elevator TianMing Lin, Jianwei Zhang, FeiQun He 2016-11-08