Granted Patent
Utility
US 4,173,219 · App. 05/873,269
Disposable dental tray
Inventor:
Frank Lentine
Patented Case
View Patent ↗
Granted: Nov 6, 1979
Filed: Jan 30, 1978
Inventor
Frank Lentine
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.