Granted Patent
Utility
US 5,207,358 · App. 07/677,920
Isolation apparatus for a dispenser delivery system
Inventor:
Richard G. Bisker
Patented Case
View Patent ↗
Granted: May 4, 1993
Filed: Apr 1, 1991
Inventor
Richard G. Bisker
Assignee (at issue)
Dresser Industries, 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.