Granted Patent
Utility
US 5,217,461 · App. 07/839,202
Apparatus for maintaining vertebrae in a desired spatial relationship
Inventors:
Marc A. Asher, Charles F. Heinig
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: Feb 20, 1992
Inventors
Marc A. Asher
Charles F. Heinig
Assignee (at issue)
AcroMed 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.