Granted Patent
Utility
US 4,907,513 · App. 07/195,322
High volume obturator assembly method
Inventors:
Michael C. Manion, Vernon C. Ralph
Patented Case
View Patent ↗
Granted: Mar 13, 1990
Filed: May 18, 1988
Inventors
Michael C. Manion
Vernon C. Ralph
Assignee (at issue)
Honeywell Limited
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.