Granted Patent
Utility
US 4,194,195 · App. 05/872,898
Portable liquid level maintenance monitor system for vehicles
Inventors:
Kenneth C. Merrell, James H. Koegel
Patented Case
View Patent ↗
Granted: Mar 18, 1980
Filed: Feb 27, 1978
Inventors
Kenneth C. Merrell
James H. Koegel
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.