Granted Patent
Utility
US 4,986,036 · App. 07/488,226
Abrading or polishing tool
Inventor:
Donald H. Hutchins
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Mar 3, 1990
Inventor
Donald H. Hutchins
Assignee (at issue)
Hutchins Manufacturing Company
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.