Granted Patent
Utility
US 6,199,667 · App. 09/217,478
Method and apparatus for operating an elevator drive in different performance modes
Inventors:
Carmen R. Fischgold, Jorge Cruz
Patented Case
View Patent ↗
Granted: Mar 13, 2001
Filed: Dec 21, 1998
Inventors
Carmen R. Fischgold
Jorge Cruz
Assignee (at issue)
Inventio AG
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.