Granted Patent
Utility
US 4,800,313 · App. 07/113,849
Long-life motor brush holder
Inventors:
Robin L. Warner, Richard E. DeSisto
Patented Case
View Patent ↗
Granted: Jan 24, 1989
Filed: Oct 29, 1987
Inventors
Robin L. Warner
Richard E. DeSisto
Assignee (at issue)
Federal Signal 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.