Granted Patent
Utility
US 4,163,544 · App. 05/850,184
Two piece composite valve seal ring construction
Inventors:
James M. Fowler, Jr., Bertram L. Morrison
Patented Case
View Patent ↗
Granted: Aug 7, 1979
Filed: Nov 10, 1977
Inventors
James M. Fowler, Jr.
Bertram L. Morrison
Assignee (at issue)
ACF Industries 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.