Granted Patent
Utility
US 5,963,877 · App. 08/794,206
Telephone call receiver indicator
Inventor:
Hironori Kobayashi
Patented Case
View Patent ↗
Granted: Oct 5, 1999
Filed: Jan 30, 1997
Inventor
Hironori Kobayashi
Assignees (at issue)
SONY GROUP CORPORATION
Sony Trans Com 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.