Granted Patent
Utility
US 6,186,783 · App. 08/953,108
Evacuation hand piece for use during dental procedures
Inventors:
John Brassil, Shu Kun Chang, Reynaldo Quintana, Dickon Isaacs
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Oct 17, 1997
Inventors
John Brassil
Shu Kun Chang
Reynaldo Quintana
Dickon Isaacs
Assignee (at issue)
Dentsply Research and Development Corp.
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.