Granted Patent
Utility
US 4,680,899 · App. 06/811,204
Portable abrasive throwing wheel device
Inventors:
James H. Carpenter, Ronald L. Mullins, Ronald L. Smith
Patented Case
View Patent ↗
Granted: Jul 21, 1987
Filed: Dec 20, 1985
Inventors
James H. Carpenter
Ronald L. Mullins
Ronald L. Smith
Assignee (at issue)
Pangborn 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.