Granted Patent
Utility
US 4,046,150 · App. 05/596,811
Medical instrument for locating and removing occlusive objects
Inventors:
Robert S. Schwartz, Ronald R. Pfister
Patented Case
View Patent ↗
Granted: Sep 6, 1977
Filed: Jul 17, 1975
Inventors
Robert S. Schwartz
Ronald R. Pfister
Assignee (at issue)
American Hospital Supply Corp.
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.