Granted Patent
Utility
US 5,819,745 · App. 08/957,756
Pressure-regulating ear plug
Inventors:
J. Phil Mobley, Chaoying Zhang, Sigfrid D. Soli, Chris D. Johnson, Drew O'Connell
Patented Case
View Patent ↗
Granted: Oct 13, 1998
Filed: Oct 24, 1997
Inventors
J. Phil Mobley
Chaoying Zhang
Sigfrid D. Soli
Chris D. Johnson
Drew O'Connell
Assignee (at issue)
House Ear Institute
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.