Granted Patent
Utility
US 4,865,250 · App. 07/264,288
Automotive oil level control valve apparatus
Inventors:
Narendra R. Zaveri, Henry Ty, Alfred J. White
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Oct 28, 1988
Inventors
Narendra R. Zaveri
Henry Ty
Alfred J. White
Assignee (at issue)
Texas Instruments Incorporated
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.