Granted Patent
Utility
US 4,696,204 · App. 06/857,636
Water level control device and method of making the same
Inventors:
Thomas M. Buckshaw, David T. Llewellyn
Patented Case
View Patent ↗
Granted: Sep 29, 1987
Filed: Apr 29, 1986
Inventors
Thomas M. Buckshaw
David T. Llewellyn
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE 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.