Granted Patent
Utility
US 4,558,907 · App. 06/642,846
Control valve device arranged for direct or graduated release operation
Inventors:
John R. Reiss, Richard Katz
Patented Case
View Patent ↗
Granted: Dec 17, 1985
Filed: Aug 20, 1984
Inventors
John R. Reiss
Richard Katz
Assignee (at issue)
American Standard 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.