CD

Christoph Durand

OE Otis Elevator: 2 patents #650 of 1,840Top 40%
Overall (All Time): #2,072,233 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
8448751 Elevator door system Christian G. Tonna, Helmut Schroder-Brumloop 2013-05-28
7246688 Elevator door system Christian G. Tonna, Helmut Schroder-Brumloop 2007-07-24