Granted Patent
Utility
US 4,973,402 · App. 07/343,779
Flow restrictor and strainer assembly for a toilet tank fill valve and the like
Inventors:
Dwight N. Johnson, Donald C. Schrock
Patented Case
View Patent ↗
Granted: Nov 27, 1990
Filed: Apr 26, 1989
Inventors
Dwight N. Johnson
Donald C. Schrock
Assignee (at issue)
Masco Corporation of Indiana
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.