Granted Patent
Utility
US 4,920,967 · App. 07/083,610
Doppler tip wire guide
Inventors:
Cliff N. Cottonaro, Scott M. Evans, David R. Pflueger, Huntly D. Millar
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Aug 11, 1987
Inventors
Cliff N. Cottonaro
Scott M. Evans
David R. Pflueger
Huntly D. Millar
Assignee (at issue)
Pfizer Hospital Products Group, Inc.
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.