DH

David L. Hardenbrook

OE Otis Elevator: 1 patents #966 of 1,840Top 55%
📍 Glastonbury, CT: #469 of 684 inventorsTop 70%
🗺 Connecticut: #21,355 of 34,797 inventorsTop 65%
Overall (All Time): #4,026,850 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4561093 Servicing a software-controlled elevator John C. Doane 1985-12-24