Granted Patent
Utility
US 5,183,479 · App. 07/785,330
Abrasive disks and method of making
Inventor:
John R. Grimes
Patented Case
View Patent ↗
Granted: Feb 2, 1993
Filed: Nov 1, 1991
Inventor
John R. Grimes
Assignee (at issue)
Gemtex Company Limited
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.