Granted Patent
Utility
US 6,794,836 · App. 10/255,253
Electric motor drive controller with voltage control circuit operative in different modes
Inventors:
Thomas Strothmann, Joseph B. Richey, II
Patented Case
View Patent ↗
Granted: Sep 21, 2004
Filed: Sep 26, 2002
Inventors
Thomas Strothmann
Joseph B. Richey, II
Assignee (at issue)
INVACARE CORPORATION
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.