Granted Patent
Utility
US 4,184,925 · App. 05/861,852
Solid metal orifice plate for a jet drop recorder
Inventor:
E. J. Doyle Kenworthy
Patented Case
View Patent ↗
Granted: Jan 22, 1980
Filed: Dec 19, 1977
Inventor
E. J. Doyle Kenworthy
Assignee (at issue)
The Mead Corporation
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.