Granted Patent
Utility
US 5,275,539 · App. 07/896,143
Internal combustion engine oil pump
Inventors:
Donald E. Custer, Jr., James E. Macier, John Mahoney, Geno Mangubat
Patented Case
View Patent ↗
Granted: Jan 4, 1994
Filed: Jun 9, 1992
Inventors
Donald E. Custer, Jr.
James E. Macier
John Mahoney
Geno Mangubat
Assignee (at issue)
Outboard Marine Corporation
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.