Granted Patent
Utility
US 4,658,827 · App. 06/740,178
Ultrasound scanner for tissue characterization
Inventors:
Ping He, James F. Greenleaf
Patented Case
View Patent ↗
Granted: Apr 21, 1987
Filed: May 31, 1985
Inventors
Ping He
James F. Greenleaf
Assignee (at issue)
Mayo Medical Resources
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.