Granted Patent
Utility
US 6,553,869 · App. 09/297,670
Method of forming a toothed cutting blade
Inventor:
Winston MacKelvie
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: May 6, 1999
Inventor
Winston MacKelvie
Assignee (at issue)
Ray Arbesman
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.