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:
Jun. 04, 2013
Filed:
Aug. 17, 2009
Applicants:
Michael a Harrison, Santa Rosa, CA (US);
Dave Michaelson, Santa Rosa, CA (US);
Inventors:
Michael A Harrison, Santa Rosa, CA (US);
Dave Michaelson, Santa Rosa, CA (US);
Assignee:
Light Guard Systems, Inc., Santa Rosa, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E01F 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An in-roadway warning light (IRWL) apparatus incorporates a dove prism in the light beam path to embed an air gap inside the IRWL signal head housing and ensure that light from the LEDs is projected in the desired direction, while simultaneously providing moisture protection for the LEDs and associated electronics in the housing.