Granted Patent
Utility
US 4,561,220 · App. 06/681,512
Portable abrasive throwing wheel device
Inventors:
James H. Carpenter, Ronald L. Mullins, Ronald L. Smith
Patented Case
View Patent ↗
Granted: Dec 31, 1985
Filed: Dec 13, 1984
Inventors
James H. Carpenter
Ronald L. Mullins
Ronald L. Smith
Assignee (at issue)
Kennecott Holdings 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.