Granted Patent
Utility
US 6,481,469 · App. 10/127,974
Indicator for use on fluid dispensing tank
Inventors:
Harold E. Erwin, Abram B. Kuipers
Patented Case
View Patent ↗
Granted: Nov 19, 2002
Filed: Apr 23, 2002
Inventors
Harold E. Erwin
Abram B. Kuipers
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.