Granted Patent
Utility
US 6,098,735 · App. 09/029,319
Hybrid drive system
Inventors:
Chandur Sadarangani, Thomas Backstrom, Stefan Ostlund
Patented Case
View Patent ↗
Granted: Aug 8, 2000
Filed: Apr 29, 1998
Inventors
Chandur Sadarangani
Thomas Backstrom
Stefan Ostlund
Assignee (at issue)
ABB AB
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.