Granted Patent
Utility
US 4,344,594 · App. 06/149,907
Lift mechanism for dental chair
Inventor:
Emil Hirth
Patented Case
View Patent ↗
Granted: Aug 17, 1982
Filed: May 15, 1980
Inventor
Emil Hirth
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.