Granted Patent
Utility
US 4,270,065 · App. 06/021,454
Four pole wave wound direct current machine with multi-turn armature coils
Inventor:
Jeffrey T. Major
Patented Case
View Patent ↗
Granted: May 26, 1981
Filed: Mar 19, 1979
Inventor
Jeffrey T. Major
Assignee (at issue)
Eltra 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.