Granted Patent
Utility
US 5,819,512 · App. 08/822,268
Apparatus and method for sensing material build-up
Inventors:
Ronald E. Steffen, Ernie J. Poani, David E. Steffen
Patented Case
View Patent ↗
Granted: Oct 13, 1998
Filed: Mar 20, 1997
Inventors
Ronald E. Steffen
Ernie J. Poani
David E. Steffen
Assignee (at issue)
DICKEY-JOHN 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.