Granted Patent
Utility
US 5,261,439 · App. 07/937,961
Vacuum-actuated vent assembly
Inventor:
Robert S. Harris
Patented Case
View Patent ↗
Granted: Nov 16, 1993
Filed: Aug 28, 1992
Inventor
Robert S. Harris
Assignee (at issue)
Stant Manufacturing 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.