Granted Patent
Utility
US 5,609,656 · App. 08/682,294
Plant fiber grain-spacer for abrasive bonds
Inventor:
David B. Hanson
Patented Case
View Patent ↗
Granted: Mar 11, 1997
Filed: Jul 17, 1996
Inventor
David B. Hanson
Assignee (at issue)
Western Atlas, Inc.
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.