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:
Aug. 18, 1981
Filed:
Jul. 30, 1979
Applicant:
Inventors:
Kiyokazu Honda, Zushi, JP;
Yoshiji Yoshiike, Yokosuka, JP;
Katsuo Muraki, Imabari, JP;
Teruyoshi Kawamata, Touyo, JP;
Assignees:
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Harison Electric Co., Ltd., Imabari, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21S / ;
U.S. Cl.
CPC ...
362224 ; 313316 ; 313324 ; 362 11 ; 362219 ; 362225 ; 362240 ;
Abstract
A tubular incandescent lamp which comprises an elongate transparent envelope; and a plurality of small lamps linearly arranged and extending lengthwise through the envelope, each of said small lamps containing a helically coiled filament and wherein the difference between the inner diameter of the envelope and the outer diameter of the respective lamps is chosen to be 2 mm or less.