Granted Patent
Utility
US 4,338,538 · App. 06/141,738
Removable brush holder for dynamoelectric machine
Inventor:
Jeffrey T. Major
Patented Case
View Patent ↗
Granted: Jul 6, 1982
Filed: Apr 18, 1980
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.