Granted Patent
Utility
US 4,353,695 · App. 06/141,792
Retraction mechanism for dental units and the like
Inventor:
Gerd H. Merkle
Patented Case
View Patent ↗
Granted: Oct 12, 1982
Filed: Apr 21, 1980
Inventor
Gerd H. Merkle
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.