Granted Patent
Utility
US 4,756,506 · App. 06/928,197
Flexible valve
Inventors:
Elwood J. Meyers, Laurence E. Jones
Patented Case
View Patent ↗
Granted: Jul 12, 1988
Filed: Nov 7, 1986
Inventors
Elwood J. Meyers
Laurence E. Jones
Assignee (at issue)
Barber-Coleman 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.