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:
Sep. 14, 1976
Filed:
Mar. 10, 1975
Applicant:
Inventors:
James H Heasley, Shaker Heights, OH (US);
Alan G King, Macedonia, OH (US);
Assignee:
Ferro Corporation, Cleveland, OH (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350103 ; 404 12 ; 350 97 ; 350 99 ;
Abstract
A retroreflective device is disclosed comprising a convex-concavo lens having a cube-corner array extending across its concavity. The device returns in the same direction from which it is received a large proportion of incident light. The lens body is adapted with respect to reflected light to indicate a larger than actual area of the cube-corner array. The retroreflective device may be used as a marker, such as a roadmarker, the convex side of the lens body being exposed to receive the incident light.