Granted Patent
Utility
US 4,676,255 · App. 06/752,315
Telemetric in-vivo calibration method and apparatus using a negative pressure applicator
Inventor:
Eric R. Cosman
Patented Case
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Granted: Jun 30, 1987
Filed: Jul 3, 1985
Inventor
Eric R. Cosman
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.