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:
Dec. 28, 1976
Filed:
Dec. 03, 1975
Applicant:
Inventors:
James Alan Lufkin, Piedmont, CA (US);
Paul E Peterson, Piedmont, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09B / ;
U.S. Cl.
CPC ...
35 3 / ; 35 70 ;
Abstract
A plurality of rectangular blocks are juxtaposed in a rectangular coordinate ordered array to define a generally planar exposed surface with the opposite surface of the blocks attached to a flexible backing which functions as a hinge to allow a linear array of blocks to be pivoted parallel to a rectangular coordinate and expose indicia on the juxtaposed surfaces of the linear array, the indicia being related to other indicia on the exposed surface of the array such as the product of multiplying the two numbers along coordinate edges of the array.