Granted Patent
Utility
US 6,026,724 · App. 08/785,339
Sharpening device
Inventors:
Holger Hagen, David M. Vanistendael
Patented Case
View Patent ↗
Granted: Feb 22, 2000
Filed: Nov 22, 1995
Inventors
Holger Hagen
David M. Vanistendael
Assignee (at issue)
Pleiger Plastics 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.