Granted Patent
Utility
US 4,354,838 · App. 06/240,598
Foot controller for dental instruments or the like
Inventors:
Gerd Hoyer, Helmut Pietschmann
Patented Case
View Patent ↗
Granted: Oct 19, 1982
Filed: Mar 4, 1981
Inventors
Gerd Hoyer
Helmut Pietschmann
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.