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:
Dec. 12, 1989
Filed:
Aug. 18, 1986
Applicant:
Inventors:
Hiroshi Takakura, Mobara, JP;
Sachio Koizumi, Mobara, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313344 ; 313341 ; 219236 ; 72135 ;
Abstract
The improved structure of a heater for an indirectly-heated cathode which is used for CRTs or the like is disclosed. A core wire for a heater is wound around a mandrel into a primary winding so that the inner diameter of the primary winding is 4.3 to 6.0 times the diameter of the core wire. The primary winding may be further wound into a secondary winding.
Takakura, Hiroshi. (1989). Heater for indirectly-heated cathode (U.S. Patent No. 4886995). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4886995
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile