Granted Patent
Utility
US 5,201,715 · App. 07/797,115
Implantable devices having ultrasonic echographic signature
Inventor:
Martin Masters
Patented Case
View Patent ↗
Granted: Apr 13, 1993
Filed: Nov 19, 1991
Inventor
Martin Masters
Assignee (at issue)
McGhan Medical 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.