Granted Patent
Utility
US 4,777,401 · App. 07/004,491
Color picture tube having a face panel with an outer face having a hyperbolic curvature
Inventors:
Kakuichiro Hosokoshi, Shigeya Ashizaki, Osamu Konosu, Osamu Adachi
Patented Case
View Patent ↗
Granted: Oct 11, 1988
Filed: Jan 20, 1987
Inventors
Kakuichiro Hosokoshi
Shigeya Ashizaki
Osamu Konosu
Osamu Adachi
Assignee (at issue)
Matsushita Electronics 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.