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:
Nov. 25, 1997
Filed:
Sep. 25, 1995
Applicant:
Inventors:
Michael Joseph Shea, Salem, MA (US);
Jakob Maya, Brookline, MA (US);
John Francis Waymouth, Marblehead, MA (US);
Assignee:
Matsushita Electric Works R&D Lab, Woburn, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V / ;
U.S. Cl.
CPC ...
362293 ; 362231 ; 34081541 ; 34081556 ;
Abstract
A narrow band light source is combined with a narrow band filter on the face of a traffic light to reduce the problem of sun glare reflected from one traffic light, reducing intensity of the sunlight glare while light from the narrow band source passes through the filter essentially unattenuated, allowing system efficiency to remain high.
Shea, Michael. (1997). Display lighting with matched narrow band filter and light source (U.S. Patent No. 5690421). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5690421
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile