The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 06, 1989
Filed:
Mar. 24, 1988
Osamu Adachi, Osaka, JP;
Osamu Konosu, Kyoto, JP;
Abstract
A color picture tube includes a rectangular shadow mask having a longer axis and a shorter axis. The shadow mask has a curved surface. A point of the curved surface of the shadow mask is represented by an orthogonal coordinate system having an X component, a Y component, and a Z component. The coordinate system has an origin coincident with a center of the curved surface. The X component is measured along the longer axis. The Y component is measured along the shorter axis. The Z component is measured in a direction perpendicular to directions of the longer and shorter axes. A sagittal height of the curved surface represented by the Z component and measured from the origin is given by a polynomial including a term of a sixth-degree power of one of the X component and the Y component.