Granted Patent
Utility
US 4,442,003 · App. 06/430,326
Filter assembly
Inventor:
Earl R. Holt
Patented Case
View Patent ↗
Granted: Apr 10, 1984
Filed: Sep 30, 1982
Inventor
Earl R. Holt
Assignee (at issue)
Hose Specialties Company
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.