Granted Patent
Utility
US 4,625,703 · App. 06/720,876
Crankcase ventilating system, flow control device therefor and method of making the same
Inventors:
James A. Otto, Marvin P. Weaver
Patented Case
View Patent ↗
Granted: Dec 2, 1986
Filed: Apr 8, 1985
Inventors
James A. Otto
Marvin P. Weaver
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE 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.