Granted Patent
Utility
US 5,909,212 · App. 08/893,878
Apparatus and method for controlling display of electrical program guide
Inventors:
Yasutomo Nishina, Tomoyuki Hanai
Patented Case
View Patent ↗
Granted: Jun 1, 1999
Filed: Jul 11, 1997
Inventors
Yasutomo Nishina
Tomoyuki Hanai
Assignee (at issue)
SONY GROUP 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.