Granted Patent
Utility
US 4,719,918 · App. 06/861,059
Subperiosteal tissue expander
Inventors:
Donald J. Bonomo, Robert C. Paulson
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: May 8, 1986
Inventors
Donald J. Bonomo
Robert C. Paulson
Assignee (at issue)
Cox-Uphoff 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.