Granted Patent
Utility
US 5,931,355 · App. 08/869,015
Disposable rotary microvalve
Inventor:
Richard Jefferson
Patented Case
View Patent ↗
Granted: Aug 3, 1999
Filed: Jun 4, 1997
Inventor
Richard Jefferson
Assignee (at issue)
Techcon Systems, 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.