QZ

Qingian Zeng

OE Otis Elevator: 1 patents #966 of 1,840Top 55%
Overall (All Time): #3,305,360 of 4,157,543Top 80%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
7810611 Elevator car assembly having an adjustable platform Patricia Derwinski, Bryan Robert Siewert 2010-10-12