Granted Patent
Utility
US 4,884,333 · App. 07/312,765
Method of making a stepper motor
Inventors:
Roy Cooper, Charles Hansen
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: Feb 21, 1989
Inventors
Roy Cooper
Charles Hansen
Assignee (at issue)
TRI-TECH 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.