Granted Patent
Utility
US 4,966,580 · App. 07/382,021
Oral feeding appliance
Inventors:
John J. Turner, Mary J. A. Turner
Patented Case
View Patent ↗
Granted: Oct 30, 1990
Filed: Jul 19, 1989
Inventors
John J. Turner
Mary J. A. Turner
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.