Granted Patent
Utility
US 4,536,157 · App. 06/673,863
Lever actuated chuck mechanism for dental handpiece
Inventor:
Leonid I. Maizenberg
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Nov 21, 1984
Inventor
Leonid I. Maizenberg
Assignee (at issue)
Sybron 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.