Granted Patent
Utility
US 4,904,183 · App. 07/171,966
Orthodontic debonding method and tool
Inventors:
Clarence W. Hannan, Wilford A. Snead, Jirina V. Pospisil, Robert P. Eckert
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Mar 23, 1988
Inventors
Clarence W. Hannan
Wilford A. Snead
Jirina V. Pospisil
Robert P. Eckert
Assignee (at issue)
Unitek
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.