Granted Patent
Utility
US 4,258,799 · App. 06/097,621
Inlet control valve
Inventor:
Richard E. Eckman
Patented Case
View Patent ↗
Granted: Mar 31, 1981
Filed: Nov 27, 1979
Inventor
Richard E. Eckman
Assignee (at issue)
Dresser Industries, 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.