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:
Oct. 11, 1983
Filed:
Mar. 23, 1982
Applicant:
Inventors:
Alan M Frank, Livermore, CA (US);
William R Edwards, Modesto, CA (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
F21L / ;
U.S. Cl.
CPC ...
362157 ; 362186 ; 362208 ; 362800 ;
Abstract
A long-lifetime light source with sufficiently low intensity to be used for reading a map or other writing at nighttime, while not obscuring the user's normal night vision. This light source includes a diode electrically connected in series with a small power source and a lens properly positioned to focus at least a portion of the light produced by the diode.