Granted Patent
Utility
US 4,749,233 · App. 06/831,575
Method for the manufacture of bristle products
Inventor:
Georg Weihrauch
Patented Case
View Patent ↗
Granted: Jun 7, 1988
Filed: Feb 21, 1986
Inventor
Georg Weihrauch
Assignee (at issue)
Coronet-Werke Heinrich Schlerf GmbH
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.