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:
Mar. 23, 2004
Filed:
May. 16, 2002
Kazuo Ishibashi, Fukuoka, JP;
ATEX Co., Ltd., Fukuoka-ken, JP;
Abstract
Provided is an LED bulb with a higher distribution of luminous intensity which is close to those of tungsten bulbs, in which the problem in directivity of the prior art LED bulbs has been solved while maintaining the advantages of an LED, that is, a long life and an energy saving characteristic. The LED bulb comprises a printed circuit board which is flat when developed and is bendable to form a cage, a plurality of LEDs which are disposed on the printed circuit board , and a transparent or semi-transparent cover which encloses the printed circuit board formed into the cage. The printed circuit board may have a plurality of belt-like branches which extend in radial directions from the center of the printed circuit board . The LED bulb may further comprise a power unit housing for containing a power unit which supplies electric current to each of the LEDs