Granted Patent
Utility
US 5,419,705 · App. 08/105,727
Talking book with removable sound source
Inventor:
Sigurd Sandvik
Patented Case
View Patent ↗
Granted: May 30, 1995
Filed: Aug 11, 1993
Inventor
Sigurd Sandvik
Assignee (at issue)
Sandviks Bokforlag
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.