Granted Patent
Utility
US 4,871,455 · App. 06/870,237
Filter assembly with lockable lug means
Inventors:
Ralph D. Terhune, James Murphy
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: Jun 3, 1986
Inventors
Ralph D. Terhune
James Murphy
Assignee (at issue)
Facet Enterprises, 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.