Granted Patent
Utility
US 4,649,570 · App. 06/868,880
Headset receiver cartridge and earphone case therefor
Inventors:
William H. Terbrack, Harvey F. Brion, Ronald J. Minear
Patented Case
View Patent ↗
Granted: Mar 10, 1987
Filed: May 23, 1986
Inventors
William H. Terbrack
Harvey F. Brion
Ronald J. Minear
Assignee (at issue)
Hughes Aircraft 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.