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. 15, 2000
Filed:
Sep. 16, 1998
Applicant:
Inventor:
Wataru Yukawa, Tokyo, JP;
Assignee:
The Nippon Road Company Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E01C / ; E01C / ; E01C / ;
U.S. Cl.
CPC ...
404 35 ; 404 73 ;
Abstract
A concrete block has a first and a second hole passing through the concrete block in a vertically direction. An internal thread is formed in the first and the second hole. A plurality of tiles have a slipping resistivity. The tiles are arranged in order on an upper surface of the concrete block. The first and the second hole each have at a level of the upper surface an open region smaller than a respective tile.