Granted Patent
Utility
US 4,407,219 · App. 06/283,149
Pile brush for conditioning a moving surface
Inventor:
John C. Dellevoet
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: Jul 14, 1981
Inventor
John C. Dellevoet
Assignee (at issue)
Schlegel 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.