Granted Patent
Utility
US 6,179,682 · App. 09/195,786
Teaching toy telephone
Inventors:
Barbara Plain, Wai Hing Kim, Yau Chung Siu
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Nov 19, 1998
Inventors
Barbara Plain
Wai Hing Kim
Yau Chung Siu
Assignee (at issue)
Learning Resources, Inc.
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.