Granted Patent
Utility
US 4,669,496 · App. 06/898,868
Liquid proportioner
Inventors:
David M. Kemp, Hartl R. Jones
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Aug 20, 1986
Inventors
David M. Kemp
Hartl R. Jones
Assignee (at issue)
Figgie Inernational 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.