Granted Patent
Utility
US 4,249,333 · App. 05/884,780
Infant development ring toy
Inventors:
Richard A. Chase, D. Michael Williams, Danny E. Simpson
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Mar 8, 1978
Inventors
Richard A. Chase
D. Michael Williams
Danny E. Simpson
Assignee (at issue)
Johnson & Johnson GmbH
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.