Granted Patent
Utility
US 4,842,578 · App. 07/186,645
Surgical abrading instrument
Inventors:
Lanny L. Johnson, Robert E. Brissette
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Apr 14, 1988
Inventors
Lanny L. Johnson
Robert E. Brissette
Assignee (at issue)
Dyonics, 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.