Granted Patent
Utility
US 4,256,285 · App. 06/045,209
Eccentric rotary valve with control-improving wing member
Inventor:
James V. Davidson
Patented Case
View Patent ↗
Granted: Mar 17, 1981
Filed: Jun 4, 1979
Inventor
James V. Davidson
Assignee (at issue)
Honeywell 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.