Granted Patent
Utility
US 4,685,331 · App. 06/721,535
Thermal mass flowmeter and controller
Inventors:
Wayne G. Renken, Dan B. LeMay, Ricardo M. Takahashi
Patented Case
View Patent ↗
Granted: Aug 11, 1987
Filed: Apr 10, 1985
Inventors
Wayne G. Renken
Dan B. LeMay
Ricardo M. Takahashi
Assignee (at issue)
Innovus
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.